Can anyone supply a lead for grub screws

[Ian ParkinParticipant @ianparkin39383]

I need 20 of these?

5/16 unc with the brass pad

Any ideas?

[Ian ParkinParticipant @ianparkin39383]

[Michael GilliganParticipant @michaelgilligan61133]

On a quick check, it looks like WDS are only offering Metric : **LINK**

https://www.wdscomponents.com/en-gb/steel-set-screw-with-brass-tip-wds-762/c-525/p-33593

… but you may want to dig a little deeper

Otherwise, you might try McMaster-Carr, in USA

MichaelG.

.

https://www.mcmaster.com/

Edited By Michael Gilligan on 23/08/2020 10:33:10

[Brian WoodParticipant @brianwood45127]

Ian,

Try WJPerry Jaguar Spares. An unlikely name I know but worth trying

Phone 01604 810814

Regards Brian

PS You may have to fit the brass bit yourself

[Ian ParkinParticipant @ianparkin39383]

Brian

do you mean drill the grub screw and turn up some brass pads?

can I drill a grub screw?

[not done it yetParticipant @notdoneityet]

They are normally hardened, so depends on the duty whether you can soften them. But carbide will drill them if needed in the hardened state. Might need to be imaginative to hold them.🙂

[CirclipParticipant @circlip]

" can I drill a grub screw? "

You serpantly can, just use a SHARP drill, you DON't need carbides.

A few years ago, a machine used for cutting mitres with a double headed saw on UPVC frames had to be adjusted for length settings constantly. One head was fixed, other was slid and nipped up on a round slide. Problem being, as expected, burrs thrown up on shaft. Had no idea about the existence of brass "buttoned" screws but about half an hour (At home) had half a dozen (6) Allen cap screws converted. Saw the commercial ones about twelve months after I left.

Regards Ian.

[peak4Participant @peak4]

I've drilled them with a sharp centre drill in the past; for obvious reasons, starting with a cup ended screw might make life easier.
Alternatively, maybe stainless grub screws would be easier to drill.
The other possibility would be hollow or vented grub screws, though the only ones I've found with a quick search in the UK are metric.
I'm sure Williams on Green Lane would have kept them in the dim and distant past.

Bill

[CirclipParticipant @circlip]

Before you ask, they can be held in a split collet, socket inwards, in the lathe for drilling.

Regards Ian.

[Douglas JohnstonParticipant @douglasjohnston98463]

I have often cut and drilled stainless ones, since all the ones I have used were never hardened. They are not as robust as hardened steel ones but usually fine and they don't rust.

Doug

[Ian ParkinParticipant @ianparkin39383]

For now I’ve punched out some 2mm thick brass pads and the operators will have to drop one of those down the holes before using a normal grub screw

the machine maker wants £12 each for the brass pad ones

[Brian WoodParticipant @brianwood45127]

Ian,

You asked me if you can drill a grub screw, others have pretty well answered your question for me, and you have a working solution for now as well. Very short grub screws like these present difficulties for fitting a pad securely anyway.

I wondered if a plain butt joint with a good engineering adhesive would be satisfactory. after all the joint will be in compression in use.

Regards Brian

[Clive HartlandParticipant @clivehartland94829]

Try pts_uk.com

[old martParticipant @oldmart]

The grub screws will probably be made of the same steel as high tensile SHCS (12.9) which are easy to cut with a hacksaw, so hss will machine and drill them ok.

[Howard LewisParticipant @howardlewis46836]

Does the brass pad HAVE to be fixed in the grubscrew? If so, as already suggested, "gluing on" the pad is an alternative.

Usually, I drop as short brass pad down the hole and follow it up with the grubscrew. This provides good clamping force without damaging the item being clamped.

This, of course, assumes that the tapping is long enough to accept the extra 1.5 mm of brass pad.

Howard

[Author]

Posts