25215 Do it Best Yellow Formula 55 Pipe Thread Sealant - harvey seal formula 55

Parts with coarse threads assemble faster than fine threads. For example, a 3/8-24 screw takes 24 revolutions to advance it one inch, while it takes a 3/8-16 only 16 revolutions to advance the screw one inch.

The one point that usually motivates users to select fine-thread parts over coarse-thread parts is that with a fine-thread having a slightly larger tensile stress area, therefore, should have a higher tensile strength than do corresponding coarse-thread parts. This is a valid point only when both parts have the same hardness.

Coarse threads are less affected by nicking. Fine threads are shallower than coarse threads and more prone to nicking. Thread gaging and thread interference are frequent during assembly due to nick threads.

In stainless threaded assemblies, coarse threads are much less likely to gall than fine threads. Surface friction between mating stainless steel threads causes thread galling. The closer the fit between mating threads and the more rotations the threads must experience, the greater the chances become for thread galling. Since fine threaded components have less pitch diameter clearance, they have to rotate more times than coarse threaded components. Therefore, the more likely to experience galling.

Coarse threads are less affected by plating build-up. A given plating thickness consumes a greater percentage of the plating allowance on a fine thread than on coarse threads. Fine threads have more gaging and assembly problems than do coarse threads due to plating build-up.

Feeds and speeds directly impact each other, the finish, and the cost of a part. For example, if you have an issue with chatter, the first step is usually to increase the feed or decrease the RPM. Sometimes the solution is a combination of both. While there are multiple ways to address finish or cycle time issues, the correct way will vary depending on the requirements of the specific job.

Feeds refer to how fast the tool is moving per revolution of the tool or the part. Each tool has a range for feed rate that can be adjusted depending on the specific application.

When turning, for example, a higher feed rate can improve chip management and reduce cycle time. If the feed is too fast, however, the surface finish gets rougher and there can be inconsistent or reduced tool life. The goal is to find the sweet spot with a combination of good finish, good tool life, good chip control, and the fastest run time.

If you’re happy to remain in the dark, read no further. But if you want a little insight into what goes on behind machine shop doors, we’re pulling back the curtain today on how we calculate feeds and speeds.

But do you ever wonder why your shop can’t deliver on your exact specifications without increasing the cost and lead time of your part?

95 Estates Drive WestFairport, NY 14450Phone: (585) 425-2090Toll Free: (800) 722-5525Fax: (585) 425-2095sales@camtechindustries.com

Speeds refer to the RPM that a tool or part is rotating at, which is determined by surface footage and diameter. Similar to feed rate, manufacturers provide a starting range that can be adjusted to fit the application.

Since there are a lot of variables to consider, calculating speeds and feeds has one of the biggest learning curves in CNC machining. At Wagner Machine, our experienced machinists have the skills and expertise to determine the ideal feeds and speeds for complex machined parts.

You’re probably used to receiving feedback from machine shops on things like surface finishes, tolerances, and proportions of features.

Coarse threads have a greater resistance to stripping out than fine threads. Coarse threads have a greater amount of material than a fine thread to resist stripping.

In CNC machining, feeds and speeds have a huge impact on part quality and price. For any given tool and material combination there is a large starting range for feed rate and surface footage. Surface footage is used to calculate tool and part RPM based on diameter. The high end of the combined feed and speed range can be up to 500% faster than the more conservative end, depending on cutting conditions. For every job, part, and toolpath, there are many variables that have to be considered to find the right range.

When someone runs into a situation that has them stumped, we ask each other questions, collaborate, and learn from our own experiences. As we like to say, “No one knows everything, but as a group, we’ve got it pretty well covered!”

Next time you need complex machined parts, rely on the experts at Wagner Machine. Request a quote today for your next project!

Our goal is to be as creative as possible within even the narrowest range of options—but it helps when our customers afford us a little flexibility. Sometimes the difference between a 32 and a 16 surface finish can save an entire day of programming and setup time. Part design can limit our options, but if we anticipate feed and speed limitations, we’ll always make a suggestion for how we can get your part done faster and more cost-effectively.