Shaft collars attach to shafts and are used as stop features or targets for devices such as tachometers. They are usually made of aluminum, steel, stainless steel, or alloyed steel and coated with zinc, chromium or black oxide. Shaft collars made from non-metallic materials such as nylon are also available. Generally, these products are used for washdown applications such as food processing.
There are several basic shaft collar designs:
Setscrew collars are suitable for simple shaft...
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Q & A on Shaft Collars
We asked our users for their input on Shaft Collars. Here are the results of 96 users familiar with Shaft Collars.Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice
Who Took Our Poll?Top
Metallurgy and materials development
Locking fasteners for motor/gear box mounts and coupling bolts such as the phil- lok fastener.
Ringfeder, Ringspann, Lovejoy, and Fener are some that are marketed in Mexico
Applications and UseTop
I designed a twist lock for lifting containers. The 2"shaft had a 1/4'x1 1/4 groove to take a split collar then a retaining tube holds it .Very high load holding, very easy to take apart to work on, the collar was 1 1/2 id x 2 1/2 od x 11/4 thick, much better and cheaper than using a screw thread.
Retention & placement of a wide variety of components... vertical & horizontal glass washers drive shafts & pinch rollers, overhead crane drive shaft alignment, limit switch cams on both cranes & floor equipment...
Installing shafts on conveyors, mechanisms, and assembly machines.
When I needed to hold parts as bearings, gearboxes, disc, etc.
Auto repairing and machinery area
Used 2 spaced pairs to support and position 2 stub shafts for conveyor roller application where through shaft would not have fit.
This collar in its own groove will take very high end loads, a standard collar won't.
The collar on a floating drive shaft (no thrust washer) wore into the opening until the set screw entered the opening. The shaft had to be cut in two places, drilled and the collar ground out with an air-powered rotary tool. A new shaft (emergency delivery), custom made collar and washer (in-house) and 28 hrs. down time. Their screams still haunt me at night.
A setscrew collar was used as a stop on a cylinder rod. The screw damaged the rod and the cylinder had to be replaced, which was costly. And the leak from the damaged rod was messy.
Wheel/pulley flying off at higher speeds due to an oversized shaft collar.
Do not use set screw type always use clamp style so you don't damage the mating shaft.
It caused a long down time on machines and we spent a lot of money on repairs.
A collar that will hold a very high load and is very easy to take apart to service. Only use an allan key - no big heavy spanners in confined spacers.
Security for holding without damaging or breaking threaded shafts oppressors.
Have none - recently discovered available pipe sizes which were not previously available.
Maybe spare parts for complex collars.
Collars on rotating shafts must fit tightly and not have projecting set screws. Otherwise vibration problems WILL ensue. Two-piece collars with opposing screws must be rsed for high speed applications. Always use thrust washers on rotating shafts.
Be sure to verify that the selected collar will not upset the balance on a rotating shaft.
Share the application with the supplier before buying any kind of shaft collar- it helps to get the correct part.
Take an accurate measure of the shaft to be sure its not a metric size.
Use a collar that closely matches the shaft diameter. Be sure the material has appropriate wear characteristics for the job at hand.
Take time to find the right fit for your need and don't settle for something close. With a little effort, you can find the right size and right price.
McMaster-Carr has good selection but not all styles and sizes. Sometimes you need to go direct to mfg. source.
Make sure the material is compatible for load and stress and thermal response with adjacent parts.