[walter]

I phoned THK about these little plastic plugs- here's the info if anyone needs it.

These are called C-Caps and marked according to bolt size. Example:

HSR15 rail- M4 bolt- C4 cap
HSR20 rail- M5 bolt- C5 cap

The prices are about $0.16 for C4 and $0.33 for C5 (per cap).

Unfortunately, they don't sell them direct, not even from their online TOS store. When you go through dealer (like Technico):

C4 cap $0.25
C5 cap $0.50

[lgalla]

Finally a THK part I can afford without E-Bay.
Larry

[walter]

Here's the picture.
_

[shorton]

Just an update to the thread. I pinged THK about plugs for my SHS15 rails. They need C4 plugs (4 for 4mm mount screws). They added them to the store for me (now $.025). Ordered up 62 for about $25 including shipping. So you can get them from THK direct now.

[shorton]

OK, so I got some of these plugs from THK. They are fairly hard plastic. A see no easy way to get them in the holes where they are not either a) too high or b) too low. Anyone have experience using them?

[loka]

why don't you just hammer it in. it can't go deeper than the rail surface unless you are poking it in with something smaller than the cap.

[shorton]

Doesn't work like you think it would. Needs to be set around the edges slightly below because they basically push back some. A flush whack does not set them properly.

[loka]

I see. well, maybe you can buy some other manufacture's caps. everyone makes them and the rail hole sizes are all the same. some european manufactures makes them in metal with rubber o-rings if you want to go nuts.

[shorton]

Where? Who else? I couldn't find anything different when I looked.

[loka]

Bosch and Scheeberger both offers metal plugs. I assume most linear rail mounting holes are same size that you can use these on other manufactures rails too. I haven't done it personally so i can't guarantee anything.

Guide Rails - Guide Rails - actuators, ball ballscrews, bearings, Bosch bosch, guides, leadscrews linear linear, motion, rexroth rexroth, screws, shafting, star star,

[shorton]

I have an account with Bosch, looked them up. Mine are 7.5mm (THK SVS15R), their smallest is 11mm. They use some sort of press to get theirs in.