Record CL3 grub screw

[Penllysbach]

Afternoon all
Anyone know the size of the grub screw on head stock pulley pls?
Thanks

 

[Andrewf]

Think if you google the manual, should get an idea. remember that there are 2 grub screws in the pulley.
Probably M6.

 

[Penllysbach]

Think if you google the manual, should get an idea. remember that there are 2 grub screws in the pulley.
Probably M6.

Thanks, no details in the manual .. will take the remaining one to the hardware shop!

 

[Argus]

I'll have a look at one of mine later and take some measurements if I can. They are only a 1/4 inch or so in length..... very short.

It's probably Whitworth or BSF.

 

[okeydokey]

Or if the pulley is now detached take that with you and you can easily try bolts starting at M6 -- then once you know the size if they don't have grub screws try elsewhere with your new knowledge.
Some grub screws have different end profiles so as you have a sample its easy to find what you need.
See here might or not be helpful

https://www.accu.co.uk/search-uk?qu...m=Grub+Screws&utm_content=SS+-+Grub+Screws+MM
Maybe better still ask Record Power as they might be kind enough to drop one in the post to you

 

[Argus]

Bore da, Penllysbach.......

I bought my old CL3 about 35 years ago..... before metric, in the UK - so there's a temptation to assume that we were imperial in those days...... hence the initial thoughts of 3/16 inch.

However, on my machine,

1. The grub screw needs a 3mm Allen key
2. There are two screws - but they are not both the same. The lower one ends in a 'top-hat' profile and sits on a shaft key, locking it in place. the Upper screw has a rounded end and locks the lower one in place.
3. They are both about 7 or 8 mm in length with only a small part threaded - about 3 or 4 mm threaded, however counting these over 1/8 inch against a vernier, comes up with 4 complete turns. Therefore 32 to the inch. It could be 3/16 BSF.
4. On the other hand, it may be a unified 10-32 thread. Difference between 10-32, 12-24, and M6 threads - RackSolutions

You have a choice of thread here, both at 32 per inch...... depending on the age of the machine.

The CL3 head-stock has not changed much in decades; if it's fairly new then I'd look at a Unified 10-32 as an experiment.

This manual explains the head-stock in some detail- it was used across a range of machines and the screws are mentioned as item 34 in the parts break-down. There are, though some pictures of the grub screws.

Record Power CL3-CAM Original Instruction Manual (Page 36 of 48) | ManualsLib

It may be worth calling Record. They have been helpful to me in the past when I needed spares.

Good luck

 

[Penllysbach]

Thank you

 

[Penllysbach]

Thank you