High Carbon Steel offers the greatest strength and hardness over its counterparts, low and medium carbon steel. However, the steel is less ductile due to the higher carbon rate, meaning harder to machine, cut, and weld. High Carbon Steel can also be heat treated; however, this process makes the steel extremely hard and brittle.

140 degreeSpotDrill

Spotface holes are rarely made by hand. Spot-facing cutters exist, with a cylindrical peg to locate into the drilled hole before cutting. Although, more often, spot-facing is performed on a mill or CNC machine.

In either case, the spotface serves the purpose of providing a flat landing onto a controlled and precise surface. It imposes both flatness and precision onto otherwise imprecise or unsuitably shaped parts.

Spotdrill bit

In general, spot-facing is sized to be larger than the part that is designed to land upon it. It should have sufficient depth to ensure a fully annular flat surface, removing all curvature or roughness from the landing surface.

Spotdrill depth

Low alloys steels have a much lower percentage of alloying elements. Depending on the added alloys, strength, welding capabilities, and corrosion resistance may vary.

Our temperature-controlled 300,000 square foot facility is equipped with full rail service, multiple slitters, including a heavy-gauge line, numerous fiber lasers, multi–blanking, cut to length, stretcher leveling, and metallurgical capabilities.

Did you know that tool steel is made of 75% mill and purchased scrap? Tool steel is often used in fabrication shops to make tools, drill bits, dies, and knives. This material is also known for its hardness, thermal properties, and resistance to abrasion and erosion.

Spotface holes are blind or through holes that have had a perpendicular and flat-faced shallow shoulder cut at the material face. This design provides a high-quality surface on otherwise rough-surfaced parts or provides a perpendicular landing surface on otherwise curved-surface parts.

Medium Carbon steel is often used in applications where high strength, moving parts are needed, such as air compressors, pistons, heavy machinery shafts, gears, crankshafts, and other transportation and tool parts.

Spot hole angle fixapp

Alloy steels are used in OCTG (oil country and tubular goods, infrastructures like power generation and transformers, big agriculture, automotive, railways and mining, and defense.

Where the hole is blind, tapping requires a two-stage operation. The thread is initiated with a taper or middle tap and then completed with a bottoming tap to the required depth. The choice between taper and middle taps is driven by the blind hole depth; where its use is possible, the taper tap gives a softer and more certain start to the thread cutting. But, if the taper excludes effective (full depth) cutting as it is longer than the blind hole is deep, it is necessary to use a middle tap.

Spot hole angle fixreviews

Shock Resisting Steel or S- grades are the most substantial grade of tool steel. S- grades contain Silicon, small amounts of Carbon, Tungsten, Chromium, and Manganese. S- Grade tool steels have high strength and toughness, hardness, wear resistance, and resistance to shock.

Xometry provides a wide range of manufacturing capabilities, including CNC machining and other value-added services for all of your prototyping and production needs. Visit our website to learn more or to request a free, no-obligation quote.

The purpose of spot-facing a hole is to provide a smooth, perpendicular/flat landing for a component to be fixed down to the surface. Such a component may be a post/standoff held down by a threaded fastener, or a fastener holding other parts on the reverse side of the spotface.Â

Spotdrillangle

Larger companies such as Boeing have design manuals (BDM-1327) that specify the nominal diameter of the spotface as the matching size of the cutter to be used (to reduce unnecessary machine time). As a guide, the appropriate diameter is approximately the flat seat diameter required, plus 2x the corner radius of the cutter. The ASME Y14.5-2009 guide for sizing a spotface specifies it as equal in diameter to the required diameter with no safety allowance for radii.

High Strength Low Alloy or HSLA Steel is a strong, formable grade of steel. These are made to meet a specific mechanical property. Niobium (NB/CB), Vanadium (V), Titanium (TI) are added to create an HSLA.

Hot Working Steel or H – Grades is ideal in applications that require wear resistance and toughness at elevated temperatures. H – Grades are divided into three groups, Chromium Type, Tungsten Type, and Molybdenum Type.

Water – Hardening or W- Grades are water quenched. This steel grade contains low-cost, high-carbon steels that are susceptible to cracking and other forms of fragility.

The most common high alloy steel is stainless steel; it contains at least 12% chromium. High alloys steels are defined by the percentage amount of alloying elements.

The content appearing on this webpage is for informational purposes only. Xometry makes no representation or warranty of any kind, be it expressed or implied, as to the accuracy, completeness, or validity of the information. Any performance parameters, geometric tolerances, specific design features, quality and types of materials, or processes should not be inferred to represent what will be delivered by third-party suppliers or manufacturers through Xometry’s network. Buyers seeking quotes for parts are responsible for defining the specific requirements for those parts. Please refer to our terms and conditions for more information.

Medium Carbon Steel is stronger than low carbon steel, making it more difficult to weld, form, and cut. Common Medium Carbon Steel grades are US ASTM SAE AISI 1030, 1034, 1035, 1038, 1040, 1042, 1043, 1045, 1050, 1055. Contact Alliance Steel and talk about inventory today.

Where the hole to be spot-faced is formed/drilled through to the other side of the part, the tap required for threading such a hole is a taper or middle type. These two forms of tap have the initial threads ground away, allowing the tap to enter the hole and correctly center from the start of tapping/thread cutting.

There are no universal standard charts that define spot-facing of parts. It becomes the responsibility of the designer and/or machinist to correctly size both the diameter and the net depth of the spotface operation to suit the needs of the part.

Spot hole angle fixtool

While spot-facing and counterboring of holes are geometrically identical operations, the spotface provides a flat landing surface, where the counterbore fully recesses the flat-faced fastener fitted to the hole so treated. This article will further discuss spotface holes, how to drill one, how to choose the right tap, as well as the applications and uses of a spotface hole.

Stainless Steel is an alloy of chromium and iron and is known for its exceptional corrosion resistance and high strength at an affordable price. The Chromium content in Stainless Steel is at least 10.5% and a vital element in production. In addition, other elements like nickel, silicon, nitrogen, and carbon are added to improve the steel's capabilities and properties.

Alliance Steel is a top flat-rolled steel supplier, coil processor, and material distributor dedicated to supporting various manufacturing needs across many industrial sectors. We have been a leader in flat-roll steel supply and coil processing leader for over 20 years.

Alliance Steel can supply an extensive assortment of stainless-steel products to meet customer needs, including 300 and 400 series products. Our value-added service capabilities for stainless steel sheet and coil include slitting, shearing, stretcher leveling, blanking, and metallurgical support.

Alliance Steel is prepared to support your steel needs with an extensive inventory of flat-rolled sheet and coil products. We maintain a selection of hot rolled steel, hot rolled pickled and oiled, hot rolled pickled dry, cold-rolled steel, motor lam, all coated products steel products. For more information, please call 219-427-5400 or send us a contact form.

Spotdrill vs center drill

Cold Working Steels can be broken down into three subcategories. These are Air - Hardening (A- Grades), Oil – Hardening (O- Grades), and D – Grades.

High-Speed Steels or HSS are known and used to cut through material at high speeds. There are two classifications of alloying elements, Tungsten and Molybdenum.

Oil – Hardening or O- Grades is often referred to as general-purpose steel, meaning extremely versatile. O - Grades have high wear resistance due to the amount of carbon that is resistant at high temperatures.

In May of 2020, we relocated to Gary, Indiana, strategically placing ourselves near significant highways, mills, and ports. There are also two additional sales locations in the Mid- South (Atlanta and Memphis).

Carbon Steel is a metal alloy, meaning it contains two elements, iron and carbon. Carbon Steel can be broken up into three subtypes, low, medium, and high carbon steel. By appearance, carbon steels can have a matte-like or dull finish and can be segregated into three subtypes: Low, Medium, and High.

This article presented spotface holes, explained what they are, and discussed when to best drill this type of hole. To learn more about spotface holes, contact a Xometry representative.

A spotface is a flat-faced, notionally cylindrical but very shallow hole that is larger in diameter than the hole that it is concentrically cut into. It is cut to impose a flat landing surface for contacting/mating parts, such as washers or fastener heads. The primary reasons for spot-facing holes are:

The ISO drawing callout symbol for a spotface hole is a subset of the callout for a counterbore, with the letters SF superimposed:

Air – Hardening or A – Grades have a higher chromium content which results in better responses to heat treatment and machinability.

D – Grade tool steel is air-hardening, high carbon, and high chromium steel. This grade of tool steel has excellent abrasion resistance and maximum toughness.

For a through hole, the selection of taper or middle taps depends on the depth of the hole to be tapped. There must be enough total length of unaltered tap and shank combined to allow the tap to penetrate deeply enough to complete the thread through the part.