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High precision internal grinding methods such as ID grinding and honing are used to achieve smooth finishes and tight tolerances on bore, hole, and tube IDs.

The metal shearing process can be quick and inexpensive for cutting some simply shaped parts, but it has disadvantages including burrs and end deformation.

A mill finish is the texture of metal, or material in general, as it leaves the mill; an unfinished appearance, it is often very sought after by manufacturers ...

Copper tungsten electrodes combine the thermal resistivity of tungsten with copper’s resistance to DC arcing, making them a smart choice for EDM of carbides.

Learn why precision CNC Swiss machining is used in the production of medical electrodes made from MP35N® for electrical signal delivery devices.

What, then, is the easiest way to think of runout vs. total runout? Circular runout controls only a particular circular cross section of a part, while total runout controls the entire surface of the part.

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You can measure runout by spinning the part while an indicator gage takes readings across the pertinent surface — either a cross section to measure circular runout or the entire part surface when measuring total runout.

Celebrating 50 Years of Precision Manufacturing: Metal Cutting Corporation is genuinely thrilled to say we have just passed a significant milestone in our company history.

Learn why resistance welding electrodes require a material with the right combination of thermal conduction, electrical resistivity, and reactivity.

Learn 7 simple rules to help ensure that calibrated measuring yields accurate and consistent results for your small parts manufacturing.

Learn why a small diameter metal probe requires choosing a material that is strong enough to maintain the probe’s shape, straightness, and direction.

It helps to have a partner like Metal Cutting, where our goal is to work with you to deliver high-quality precision parts that meet your specifications, while also keeping your production costs within budget.

Providing all the details in an engineering drawing, including runout or total runout symbols and tolerances as appropriate, can help to alleviate confusion.

Learn more about Metal Cutting’s certification in the ISO 9001:2015 standards and commitment to quality management practices.

Different precision metal cutting options vary in characteristics and appropriate applications, making the choice not quite so easy. This guide will help.

Man, I haven't done manual threading on a lathe since high school, that's going back a couple decades, and then some! Not being familiar with your machine, I don't have a lot to offer you. I would suggest posing your question on an actual machining forum, such as CNCZone.com or PracticalMachinist.com (hope you have thick skin for the latter)

The electrochemical grinding process is a highly specialized method that combines surface grinding, chemistry, and fixturing, and has limited applications.

With its unique properties, tungsten wire is used in a wide range of industry applications, from tungsten filament wire bulbs to tungsten thermocouples.

Learn the advantages of copper tungsten electrodes for resistance spot welding of wire harnesses in battery electric vehicles (BEVs).

Eddy current testing is an important method of nondestructive testing. See what you may not have known about the process.

Consider the methods used for heat treating metals, as well as the effects, when specifying your requirements for the cut-off of small metal parts.

In this blog, we take a look at two related GD&T features that are sometimes called out on engineering drawings. For those of us who cut and machine small metal parts, the concept of circular runout versus total runout is not as simple as it may at first seem.

Learn about the variables to consider when choosing the best resistance welding electrode material for specific resistance spot welding applications.

Learn how better materials for resistance welding electrodes speed up your welding operation. This white paper is designed to help you make a successful electrode materials choice.

Learn how tungsten as an alternative to precious metals can help you achieve uncompromising quality and still keep your budget on track.

With these RFQ tips, you can not only speed up the quote process, but also ensure you get the part you want and a cost estimate that is as accurate as possible.

A metal surface finish chart is a handy guide to standard surface finishes and characteristics such as measurement units, conversions, and typical Ra values.

Surface finish requirements are just some of the details critical to completing an RFQ that will help you optimize for manufacturability.

For tips on how to improve the accuracy of your specs and project quotes, download our free guide, How to Fine-Tune Your Quote Request to Your Maximum Advantage: Frequently Asked Questions in Small Parts Sourcing.

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How to measure runouton a shaft

It’s critical to choose a supplier you can envision working with for the long haul. Review these practical guidelines to make the right decision.

When measuring the perpendicularity of small metal parts, consider the effects of a part’s diameter, length, straightness, and manufacturing method.

Learn how the guide bushing and other features of modern CNC Swiss screw machines eliminate deflection to improve efficiency, consistency, and accuracy.

GD&T cylindricity is a three-dimensional tolerance feature used to indicate both roundness and straightness along the entire axial length of a cylindrical part.

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Along with the runout symbol, a diagram will typically show the circular runout tolerance zone — a two-dimensional area into which all points on the feature’s surface must fall.

When a single part has multiple tolerances that conflict, the tighter, more challenging tolerance must guide production and ultimately drives the part’s cost.

When designing a part, remember that different tolerances may require different processes, and not all processes can produce results to the same tolerance.

Follow these tips on how to choose a vendor for cut off metal parts and get the results you want for your precision manufacturing needs.

Learn about the role that tight tolerance plays in optimizing for manufacturability, and how to specify tolerances to ensure part quality and control costs.

The total runout tolerance zone is a three-dimensional, cylindrical area surrounding the reference point, into which all points on the rotating part must fall.

The properties of tungsten wire are valued in the medical device industry, for use in electrocautery, electrosurgery, neural probes, and other applications.

Often simply called runout, circular runout specifies how much the feature can vary in relationship to a reference point as the part is rotated around an axis. In basic terms, that means it looks at how much “wobble” there is in the feature of the part in relation to the reference point.

Our name might not give it away, but precision cut off of tight tolerance, small metal parts is at the core of our business.

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Choosing the right resistance spot welding electrode for an application depends on understanding critical properties of the different electrode materials.

Precision flat lapping and other lapping techniques can be used for small parts requiring tight control of surface finish, flatness, thickness, and parallelism.

For example, having a perfect spindle won’t erase the effects of a wobbly collet, and a bad drill can ruin the perfection of the most perfect machine tool. So inherently, you are likely to have a TIR that exceeds what is called out due to the cumulative effects of the tools’ TIR plus the runout TIR.

Hello I am trying to cut .1mm X 30mm thread in aluminum on my lathe, I dont understand what the chart on the machine is trying to tell me and I lost the useless Chinese owners manual long ago, can anyone walk me through how to make it work?

Circularity tolerance based on diameter helps to control roundness and ensure that small precision metal parts fit properly, move smoothly, and wear evenly.

Finding a supplier who can deliver quality and on-time service can be tough, especially when it comes to the medical device and other heavily regulated industries. This guide makes it simple.

Laser printing of metal is popular for a number of applications, but can you‭ ‬use it for printing of metal for‭ ‬such large quantities of such small parts?

Proper electrode design and construction is essential to ensuring consistent weld quality, minimum electrode sticking, and maximum electrode life. Learn how electrode design can impact your prod line.

However, total runout tolerance is still very important for preventing vibration, oscillation, and surface taper on rotating parts that have large areas of surface contact, such as large pump shafts, transmission shafts, and complex gears.

Learn the vital components of an effective quality control program and its role in ensuring that metal parts meet their requirements for design and function.

Unfortunately, consistent results aren’t always guaranteed. Learn what you can do to ensure calibrated measuring yields accurate results.

In the end, remember that total runout controls the total 3D surface of an entire part while circular runout only controls specific circular, 2D cross sections. And whichever feature is most appropriate for your application, choosing the best production method is critical to meeting your specified tolerance and ensuring your product achieves the desired functionality.

With the eddy current testing ‬procedure, there are a number of variables that ‬have an effect on ECT, what it can find,‭ ‬and ‬what it cannot find.

It may be tempting to assume that a very tight tolerance should be your default choice. But, when they aren’t essential, it could increase your costs needlessly.

When choosing a resistance welding electrode for any application, a thorough understanding of material properties helps to avoid production line issues.

How to measure runoutin gd&t

Over time, we’ve developed a special appreciation for tungsten and what it can do. Learn some interesting facts you may not have known.

There are 5 key areas that should never be left blank when filling out your request for cutting quote. Do you know what they are?

Thin-wheel abrasive cutting is an ideal method for high-volume 2-axis metal cutoff that requires precision, tight tolerances, no burrs, and a smooth end finish.

While laser cutting can produce a small kerf and tight tolerances, other precision cutting methods may be preferable for 2-axis cutoff of small metal parts.

Metal tubing continues to play a critical role in medical device manufacturing, but with the array of available plastic materials it can be hard to determine which material is the right one.

How to measure runoutwith dial indicator

Surface finish requirements are among the details that are critical to creating a complete RFQ that will help to optimize for manufacturability.

With a metric tolerance chart, you need to account for the upper and lower tolerance spec limits when converting between standard and metric measurements.

Learn how additive manufacturing (AM) — one of today’s fastest growing technological innovations — is changing the face of contract manufacturing everywhere.

Runoutsymbol

Learn the vital components of an effective quality control program and its role in ensuring metal parts meet their requirements for design and function.

Get answers to common questions about dissimilar metals regarding high and low conductivity electrodes and friction stir in the construction of an electrode.

Specifying the magnification level and details of how a material surface must be examined helps to ensure that parts will pass inspection and meet your needs.

For intricate geometries, sharp corners, unparalleled wear resistance, excellent cutting speeds and machinability, copper tungsten is the material of choice.

People often ask Metal Cutting Corporation if we do “metal fabrication” — and the truth is, the answer depends on how you define the term.

Learn how to prevent and detect surface flaws in the glass to metal seals used in the manufacture of a wide range of electronic products.

When polishing metal parts for 3D printed medical devices, the goal is to achieve the proper surface finishes while maintaining the device’s complex design details.

Tungsten wire continues to be a product that has a large number of diverse applications, for many of which there is no known substitute. Find out why tungsten remains widely used.

Small gages such as pin gages or pin plug gages are useful tools for inspecting IDs and making sure small diameter metal tubing meets specified tolerances.

Incandescent bulbs made with tungsten wire filaments continue to be used in automobile turn signals despite the parallel adoption of newer LED technology.

The process of creating a vacuum atmosphere, either repeatedly or in one-time production, is an important part of electronic component manufacturing.

Totalrunout

As the name implies, circular runout is typically used to control variation in circular features of a part, such as shoulders, tapers, and fillets. In the GD&T system, the circular runout symbol is an arrow.

Learn about the advantages of precision CNC machining in the manufacture of small, complex parts requiring tight tolerances, smooth finishes, and repeatability.

Precision metal grinding is often the best way to remove small amounts of material and achieve the right finish or tight tolerance dimensions on part surfaces.

For some medical device applications requiring biomaterials, tungsten and gold-plated tungsten wire may be suitable alternatives to precious metals such as gold.

While CNC machining can produce an array of complex, precision metal components, there are some challenges to the process you need to be aware of.

While the most familiar use of tungsten (incandescent light bulbs) continues to fade, the unique range of properties continue to make tungsten wire irreplaceable for a number of products and applications.

In material sourcing for the production of precision parts, avoiding non-standard material sizes can help to control costs and optimize for manufacturability.

The key to calibration tolerance is understanding both what a device is capable of doing and the tolerance to which the device has been calibrated.

Eddy current testing is an important method of nondestructive testing that is often used to inspect for flaws in the surface or sub-surface of metal materials.

Learn more about the principles of centerless grinding and how it can be used to achieve tight tolerance surface finishes on small cylindrical metal parts.

For measuring and inspecting the ID of small parts tubing, pin gages or optical measurement systems help ensure that small tubing will meet specifications.

Tungsten, also known as wolfram or volfram, has a high melting point and other interesting properties that are useful in many industries and products.

Pull rings for medical devices can be cut from 304 grade stainless steel tube or Swiss machined to provide specialty features and use other materials.

How does laser cutting compare with other precision metal cutting methods? Watch this video to learn some of the pros and cons of this metal cutting method.

The creation of new specialty metals offers alternatives to stainless steel for components used in medical device applications.

A statistically valid sampling plan in quality control provides a high level of confidence that if the sample is acceptable, the entire lot is acceptable.

For deburring of small metal parts, mass production requires the action of hand tools to be re-created by mechanical devices suited to high-volume applications.

Adherence to ISO 9000 standards by an organization tells customers that it is committed to implementing structured quality management practices.

Learn why manufacturers, designers, and engineers need to keep metal expansion from heat in mind when they create part specifications and decide how precise the part’s dimensions need to be.

In circular runout vs. total runout, the first controls variation in circular features of a part while the other controls variation in the entire part surface. Learn the difference and how to measure them here.

Learn about the five major challenges to consider when choosing CNC machining services and a partner for the manufacture of complex and precise small parts.

Electrochemical cutting (ECC) combines electrochemical erosion and grinding to produce a burr-free, shiny surface to a tight tolerance of ±0.005” (0.127 mm).

Been a long time for me also, but I do remember that you will need to change the actual gear on the machine to cut a metric thread. The chart there shows which gear you need for metric and standard. So first determine which gear is already installed. Then look at the chart on your machine for your desired pitch, then set your levers to match the chart for that pitch, the ABC levers, also have to set the lever on the bottom with all of the holes. If this is your first time cutting threads on a lathe, be aware that to stop the thread is different than hitting the foot brake. If this is the first time you are cutting threads on the lathe, machine them away from the chuck. Also make sure that on the carriage, there is a lever that you have to pivot into the lead screw, this coordinates the spindle to the lead screw. This lever usually has 1234 on it. The idea is to engage the feed lever with either 1 or 3, or 2 and 4, never 1 and 2, either odd or even. This will bugger the threads if you don't engage the lever the same way. For some practice runs, just cut really far away from the chuck to get a feel for it, how your lathe works.

As important as inspections are, 100% inspection requires time and cost without a guarantee of 100% compliance. See what a sampling plan is and how it solves this challenge.

Whether you are using a vertical mill or a lathe, the goal is to determine how balanced, accurate, and correct the spinning device is. The challenge is that everything in the machining business has a TIR.

Precision CNC Swiss machining is often used to produce bone screws and anchors with the features needed for a wide range of orthopedic and dental applications.

How to measure runoutcalculator

While honing and lapping are both used to fine-tune the finish and dimensions of metal parts, the two processes differ in where and how they achieve results.

Get an expert machinist’s perspective on how CNC metal cutting has evolved in the age of tight tolerance, micro-machining of small parts.

Metal Cutting’s methods for cutting metal tubing, such as thin wall steel tubing for medical devices, are unique compared with machining and laser metal cutting.

The characteristics of the precision tubing used in liquid dispensing systems can significantly affect the fluid dispensing process and testing accuracy.

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Learn how the right electrode material, design, and construction can help to prevent bonding problems in resistance spot welding electrodes.

Here at Metal Cutting, where every day we produce thousands of small metal parts, one of the first things we do when we see a drawing with TIR values for circular runout and total runout is evaluate whether our equipment is capable of producing the customer-specified values.

Calibration standards for devices and equipment used in measuring, inspecting, and manufacturing of precision metal parts can pose some unique challenges.

Metal Cutting Corporation uses visual and mechanical methods of metal inspection to help ensure that small parts meet customers’ manufacturing requirements.

A fully complete RFQ tells a story about the buyer, the company, and the end product and its use — information we can use to provide the right quote (and the right price).

The centerless grinding process is ideal for finishing small cylindrical metal parts that require a tight tolerance and high-volume production. Learn some of the fundamentals of this process.

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Another issue is that a machinist will often receive an engineering drawing that specifies a TIR value — but the drawing does not make it clear what exactly that means. For example:

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Waterjet cutting is typically used to cut complex shapes from large, flat sheets of metal but may not be the best choice for 2-axis cutoff of small parts.

Surface flatness is an indicator of all points along a surface lying in the same plane, with the highest and lowest points within the flatness tolerance range.

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This method allows you to determine the total indicated runout (TIR), or the total amount the gage moves. If, for example, the gage moves 0.001” (0.0254 mm) across the part and that value is within the allowed tolerance, then your part meets that specification.

When measuring the perpendicularity of small metal parts, consider the effects of a part’s diameter, length, straightness, and manufacturing method.

Learn how precision cut off and stamping compare in achieving distortion-free flatness, a sharp edge, and the precise exterior diameter needed for a spacing ring.

Any surface will have flaws under the right magnification. In this video we explain the inherent challenges with blanket requests and how to overcome them.

With profile of a line vs. profile of a surface, the former controls variation at specified cross sections while the latter controls the entire feature surface.

To avoid the challenges of verifying OD/ID concentricity, try to use other applicable GD&T symbols in place of concentricity in tubing drawings and designs.

Dopants raise the recrystallization temperature of tungsten wire and other wires, giving non-sag properties to tungsten light bulb filaments and other products.

Surface grinding services utilize precision surface grinding methods to make cubic metal parts square and parallel or the ends of metal rods perpendicular.

While graphite is often used, the properties of copper tungsten make it an ideal material for EDM electrodes for certain applications.

Industry Trend No. 3: Rising labor costs overseas are one factor in the move away from outsourcing and toward reshoring of some businesses and factories.

Learn why the characteristics of titanium tube make it a good choice for medical devices and other applications that require strength, light weight, and corrosion resistance.

Manufacturing CNC professional lathe machine isolated on a white background. Industrial concept. Stock Photo

If the TIR in a drawing is lower than our machine specs, as well as the TIR of any tools or accessories we would use, we know to alert the customer and decide the best course of action for moving forward.

Therefore, the fundamental concept is the TIR value of a part cannot exceed the cumulative TIR of all the tools used to make that part. What’s more, the TIR values of the tools are additive; one won’t cancel out another, and all can add to or worsen the wobble.

Thousands of resin compounds have been developed to expand the design options for tubing in medical devices. Yet, there are number of myths. Learn why plastic may not be a better choice to metal tubing in medical applications.

Learn the key parameters for choosing a method of 2-axis precision cut off of metal parts based on part type, material type, and part dimensions.

Wire EDM cutting advantages and disadvantages for 2-axis cutoff depend on factors including the material used, part parameters, and surface finish requirements.

The straightness properties of tungsten wire make it valuable for small diameter tungsten probes used in semiconductor wafer testing and neural activity testing.

While an automatic lathe can do simple 2-axis cutoff of metal rods and tubes, it is designed for more complex, multi-step machining operations.

The Swiss machine has evolved and improved since the original Swiss lathe was invented, making the modern method an important part of precision CNC machining.

Learn some common myths about plastic and reasons why it may not be a better choice than metal tubing for medical device applications.

Learn how to optimize for manufacturability through a unified approach to product design and the creation of a thorough and detailed request for quote (RFQ).

Cold sawing can do high-speed, burr-free cutoff of rods, tubes, and extrusions, but it is not ideal for very short lengths, smalls ODs/IDs, or hard metals.

That means total runout seeks to limit the cumulative variation across an array of part surface characteristics, such as:

It is a characteristic that is generally called out when you have a part that must rotate around a central axis and have all points on the entire surface of the part be in spec. In GD&T, the total runout symbol is a double arrow.

How to measure runoutformula

Learn about the important role of machining and tooling in the manufacture of metal parts for today’s fuel injection systems.

Utilizing a controlled environment helps to minimize the effects of heat expansion and other temperature issues on the measurement of metal parts.

What is lapping? In the right hands, this little-known process can produce parts with highly polished ends, tight length tolerances, and extraordinary flatness.

What isrunout

While automation plays a growing role in precision machining, lights out operation is still more a fantasy than a reality for most small part manufacturing.

Learn how potting can be used to create a tightly sealed package for electronic switching devices, such as the flat ribbon in semiconductors.

OD grinding is used to shape the external surface of objects between the centers and excels at removing circular defects and restoring or creating roundness.

For EDM electrodes, copper tungsten offers excellent electrical conductivity, DC arcing resistance, thermal conductivity, and wear resistance.

Total runout, on the other hand, is used to control variation in all the points on the surface of a rotated part with regard to the part’s rotation on its axis.

Learn how the properties of copper tungsten reduce or eliminate the challenges posed by those materials when they are used in their pure forms.

Learn how best practices as well as material and design considerations have an impact on the life and effectiveness of resistance spot welding electrodes.

Both circular runout and total runout are frequently used where you have components that must rotate quickly, such as drills, gears, shafts, and axles. That being said, a total runout tolerance is not called out as often, because it puts tight constraints on the entire surface of a part.

Precision tubing plays a vital role in helping to ensure the accuracy of liquid dispensing systems used in many biotechnology and laboratory environments.

In the world of small metal parts manufacturing, the Geometric Dimensioning and Tolerancing (GD&T) system uses a combination of symbols and GD&T tolerances to provide insights into how to produce the features that are essential to a part’s form and function.

Metal Cutting utilizes lapping and machining as well as other techniques to achieve flatness vs. parallelism for metal cut to length.

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Double disk grinding provides dimensional accuracy for metal part applications that require tight tolerances, parallelism, flatness, and thickness control.

And for the manufacturers who ultimately use the parts we make as components in their own products, understanding the difference between circular runout and total runout can be important to creating specifications that will yield the best results.

Gold-plated tungsten wire is useful in filtration, printing, copying, and other applications, and as an alternative to precious metals in some medical devices.

GD&T tolerances provide manufacturing guidance that must balance the need to make a part functional with the need to produce the part cost-effectively.

In comparing common tungsten uses in 2007 and today, it is clear that tungsten remains one of the most widely used and beneficial of the refractory metals.

How do you qualify a new sourcing partner and ensure an efficient and problem free experience? Considering these points will help you make a decision you can feel confident about.

For instance, when you make something using a spinning device, there are typically TIR values for three different sources of wobble — the spindle, the collet (or chuck), and the cutting tool or drill itself — any or all of which can create errors in the part.

Custom bushings that are Swiss machined for use in catheters and other medical devices allow the devices to function at a high RPM while resisting wear.