Brake Screw?!?

Think little bit more,and you will find the solution your self.

Never get despaired,that's my experience and advice to you. No body understands better about what you are doing than you.

This sounds like "ball plungers" or "spring plungers." I don't know the size of yours, but the rough average price is ~$5 each in Grainger.

Why not do like the rest of the universe. Have one non-Belleville flat washer being pressed by two brass shoes pads.

Some concept of scale would be nice. Forces acting on the "driven" part to make it move. Washer diameter, you know, just enough information to allow us to help you.

I thought I saw somewhere a set screw with a plastic tip set into the end.

Here is one.

They have different types of plastic in the tips.

Try using teflon instead of brass or

Use a totally dissimilar approach by using nylon / leather cord with single turn around the shaft tied to adjustable tension springs at the ends or

Follow the exerciser cycle arrangement where a screw adjustable stretch 'nylon strip' applies pressure to a large dia plastic wheel.

Most importantly as the worthy Guest has appropriately said "No body understands better about what you are doing than you".

We would like to take a look at your component - we specialize in prototype/low volume as well as production - our 30+ yrs of experience in design/concept r and d would be a good fit with what you're looking for - please send print/material type/heat treat/plating specs to kjacobs@ptmcorporation.com - volume - we'd like to help you out or steer you in the right direction - thx

Try to use the set screw and a piece of round polyurethane instead

Use polyurethane as a spring and brake.

are you thinking of Vlier pins? some call the ball plunger set screws, and such.

Vlier is mfgr name.

we are all farting in the wind thinking of things. we need the facts. at first it sounded to me the same set up an electric motor has for the brushes. brush , spring ,screw. than on a larger scale a hydraulic roller lifter came to mind. How much was your customer paying for the part. If the customer wants a cheaper version send a proto to china.you get what you pay for.

Be patriotic! Order it from China or India! you would support Bush and Clinton partriotic families!

Post the picture with the part next to a ruler so that we can see the siz roughly.

Also post a picture with it taken apart, also next to a ruler....

"a brake to apply force to a pivot shaft to reduce the amount of ease that a part rotates around an axis. "

Avail suitable/required space around the pivot and have a polymer (Nylon like) bush with good resilience (not rigid) with an interference fit. This would constantly apply break on the shaft and would prevent free rotation.

Need dimensions. Pictures and/or drawing will help. What material is the "brake" applied against? Joe

As I understand it, the set screw pushes on the Belleville washers, and they push on the shoe to apply some braking force to the shaft.

Would something like a worm drive hose clamp with a suitable lining do the trick?