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Taper reaming

Taper pin/reamer for 3/32"

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Martin L16/08/2021 12:02:54
7 forum posts

Hi,

First post so hello to all.

I have a 3/32" pin I need to change to a tapered pin, not sure what size I need.?.

Will a 7/64" do or do I need to go to 1/8" size for pin and reamer.

Thanks for any info.

Emgee16/08/2021 13:43:47
2404 forum posts
285 photos

Martin

As you imply the small end of the reamed hole will need to be greater than 3/32" so you need to check a tapered reamer chart sizes for a suitable reamer.

Emgee

Quick search found these, looks like metric has wider choice of sizes.

https://www.ebay.co.uk/itm/HSS-Taper-Pin-Reamer-Metric-Imperial-2mm-2-5mm-3mm-3-5mm-4mm-4-5mm-5mm-1-8-1-4-/264938005021?var=0&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338268676&toolid=10044&customid=CjwKCAjwmeiIBhA6EiwA-uaeFZ56PLdzljjnlfYGFrtjwwB0l7C0nyPfSgOyuVj_fn1OZxtamzii7RoCJDoQAvD_BwE

 

Edited By Emgee on 16/08/2021 13:59:11

not done it yet16/08/2021 14:00:17
6736 forum posts
20 photos

The taper is probably more important than the actual size (as long as greater than the current hole). A tapered pin with a 2.5 mm minimum could suffice. Different taper to imperial, mind. The wide end of the tapered pin (so the overall length of it) needs to be catered for.

Phil H116/08/2021 14:20:34
458 forum posts
60 photos

Misread your post

Edited By Phil H1 on 16/08/2021 14:23:32

Martin L16/08/2021 15:13:25
7 forum posts

Thanks for the info/help

Changing the 3/32" pin's that hold the crank on the shaft of a Stuart twin Victoria , just so they are a lot easier to remove.

Looks like 1/8" pin and reamer will be the one to go with, taper pin needs to cover 3/4" depth, going with a 1" pin OK?

Grindstone Cowboy16/08/2021 15:29:20
854 forum posts
64 photos

Just to digress..

I've never used a tapered reamer, so is the correct procedure to assemble the parts and then ream the hole in both at the same time? I'm assuming it must be, but never been told this or seen it written anywhere.

Thanks,

Rob

Martin L16/08/2021 15:37:14
7 forum posts

I'm the same never used a taper reamer before, so I'd like to know as well Rob. I'll be going through cast/steel/cast, think I'll have a trial run on steel first

roy entwistle16/08/2021 15:42:14
1504 forum posts

Ream both parts assembled together. If more than one pin is needed on one shaft they should both be reamed from the same side.

Grindstone Cowboy16/08/2021 16:22:20
854 forum posts
64 photos

Thanks Roy yes

Martin L16/08/2021 17:24:09
7 forum posts
Posted by roy entwistle on 16/08/2021 15:42:14:

Ream both parts assembled together. If more than one pin is needed on one shaft they should both be reamed from the same side.

Thanks for this.

not done it yet16/08/2021 20:18:28
6736 forum posts
20 photos

When I’ve fitted mine it has been after loctiting parts together. Choice of loctite grade is up to me. If it is intended to be permanent, a stronger grade is chosen.

I value my reamers so tend to step drill to reduce the metal that needs to be cut away with the reamer. But I’ve yet to pin anything under an inch diameter…

Nick Hughes16/08/2021 20:33:18
avatar
264 forum posts
144 photos

Here you go:-

Martin L16/08/2021 21:46:48
7 forum posts

Great info thanks, love those old vids always clear concise information.

Really looking forward to trying this now.

Grindstone Cowboy16/08/2021 23:02:00
854 forum posts
64 photos

+1 on what Martin said.

Thanks

Rob

Jon Lawes17/08/2021 05:01:57
avatar
882 forum posts

Funnily enough, all these years I've just realised I've never used a taper reamer either, but will almost certainly need to soon. Thank you.

Nigel McBurney 117/08/2021 09:04:41
avatar
999 forum posts
3 photos

Be careful when reaming with a tapered reamer,the flutes quickly fill with swarf so withdraw the reamer to clear the swarf more frequently than when using parallel reamers. use a lubricant when reaming,sluble oil,lubricating oil,or in tough materials Rocol helps,

mick H17/08/2021 09:36:39
766 forum posts
28 photos

What a superb video as posted by Nick. No excess verbiage or ego that accompanies modern offerings.

Mick

Ady117/08/2021 09:58:37
avatar
5066 forum posts
734 photos
Posted by mick H on 17/08/2021 09:36:39:

What a superb video as posted by Nick. No excess verbiage or ego that accompanies modern offerings.

Mick

I noticed that modern vids can be hugely verbose and they ALL do it, especially the USA vids

I think that the longer your page is viewed- the more advertising there is- and the more income you make

So there's tons of useless fluff and a snippet of useful at the end

Michael Gilligan17/08/2021 10:22:26
avatar
20081 forum posts
1041 photos
Posted by Ady1 on 17/08/2021 09:58:37:
Posted by mick H on 17/08/2021 09:36:39:

What a superb video as posted by Nick. No excess verbiage or ego that accompanies modern offerings.

Mick

I noticed that modern vids can be hugely verbose and they ALL do it, especially the USA vids

I think that the longer your page is viewed- the more advertising there is- and the more income you make

So there's tons of useless fluff and a snippet of useful at the end

.

I’m sure you are right, Ady

But also note that this film would have been an expensive production compared with the typical video ‘tutorial’

MichaelG.

Circlip17/08/2021 10:31:00
1500 forum posts

"I noticed that modern vids can be hugely verbose and they ALL do it, especially the USA vids"

MANY generated on this side of the pond can challenge that.

Regards Ian.

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