Supplier of 7/32″ Dowel Pins Please?

[DC31kParticipant @dc31k]

Posted by B Tulley on 22/04/2022 21:28:29:

presumably those issues wouldn't apply to drill blanks – or would they?

The ones for which I found a price were off eBay, from Zoro. They are described as hardened and ground.

My guess is that they will be parallel, but I do not know for sure. You might have to ask Drill Service, suggested above, as they probably have better technical knowledge than Zoro.

It is a good question. As supplied, they are blank in both name and marking – so if one end was smaller than the other, the only way to find out would be to measure each end, and if you have ten jumbled up in a bag, that becomes rather tedious.

[HopperParticipant @hopper]

Running HSS wheels on HSS axles might lead to wear of the hole in the wheel perhaps?

Are drill blanks hardened all the way along? Finished drills are left unhardened on the shank end to allow flex and grip. Some even have a stub of silver steel friction welded on at the shank end to save HSS.

Edited By Hopper on 23/04/2022 09:12:34

[DC31kParticipant @dc31k]

Posted by Hopper on 23/04/2022 09:11:45:

Are drill blanks hardened all the way along?

Google is your friend…

https://www.icscuttingtools.com/Ground.htm (parallel)

https://docs.rs-online.com/742e/0900766b81585f5c.pdf (h8 tolerance)

https://www.mcmaster.com/steel-drill-blanks/ (lots of options)

https://www.ceratizit.com/int/en/offerings/hard-material-solutions/industries/tool-manufacturing/rods/drill-blanks.html (with coolant holes)

[Michael GilliganParticipant @michaelgilligan61133]

For the stated application … I suspect that these might do rather nicely:

**LINK**

https://simplybearings.co.uk/shop/p100027/7/32×1-inch-Flat-Ended-Loose-Needle-Rollers/product_info.html

MichaelG.

[B TulleyParticipant @btulley]

Many thanks for all the replies and suggestions; the intended ebay supplier for 5/8" wheels with 1/4" bores didn't have matched pairs of diamond pattern knurls (they'd have the left but not the right, for example). So it was back to Chronos for wheels with 7/32" bores – and as luck would have it I discovered I had 7/32" s/st. in the shed……

[paul rushmerParticipant @paulrushmer83015]

Having worn out the pins in my Marlco I watched this thread with intrest , I have just ordered some rollers from Simply Bearings. Many thanks every body.

Paul

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