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Thread chasers

Where to buy at low cost

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Speedy Builder520/06/2011 19:37:16
2878 forum posts
248 photos
Where do we go to buy 40 and 32 tpi Whit/ ME thread chasers. I have seen some very expensive ones, and bought some very cheap ones, but never the ones you really need.
JasonB20/06/2011 19:51:42
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25215 forum posts
3105 photos
1 articles
Tracy tools do a holder so you can use a single coventry die head bits. Tehy also do other chasers
 
Jason
chris stephens21/06/2011 00:59:37
1049 forum posts
1 photos
Hi Robert,
As Jason says the Tracy tool set has a good number of chasers in a set but i cannot remember if they have those sizes. Last year at Sandown Tracy tools quite generously donated a set to us at SMEE, so I gave an impromptu demonstration and even got to show the chap from Tracy tools how they were used to cut threads. I always feel it helps to sell something if you know how to use it.
chriStephens
Chris Trice21/06/2011 02:26:18
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1376 forum posts
10 photos
I use chasers all the time to cut or finesse external threads. They can be clamped in a tool post like any other lathe tool. All of mine came second hand from Home And Workshop Machinery in Sidcup. They advertise in the MEW magazine and they're regulars at most of the model engineering shows. Although I have a few internal chasers, I tend to use a tap mounted like a boring tool for machining internal threads.

Edited By Chris Trice on 21/06/2011 02:27:52

JasonB21/06/2011 07:27:57
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25215 forum posts
3105 photos
1 articles
Tracy do a set with so 40 & 32 included. Here
Speedy Builder521/06/2011 13:54:40
2878 forum posts
248 photos
Thanks for advice - still looking as Tracy only advertise BA and H&WM don't have any at present. Surprised as there are loads of ME drawings out there with ME and Brass threads - expensive to keep buying dies, and loath to smash a new die just to make a chaser. I keep an Eye on E-bay, plenty of metric and Unified, - not so many small Whitworth form. Even buying a couple of diehead chaser sets would be expensive.
 
I bought a bucket of chasers from a private collector, but most of the useful ones were missing - still, the price was good. I suppose I should put an item on the wanted list.
chris stephens21/06/2011 14:33:37
1049 forum posts
1 photos
Hi Robert,
If you go back to the Tracy tool page and look at the bit that seems to indicate only BA and click on the little arrow, you will see two more options one of which lists 12-40TPI chasers.
chriStephens
NJH21/06/2011 16:36:34
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2314 forum posts
139 photos
Hi Robert
 
I bought a set from Tracy at last years Bristol show they comprise:-
40,32, 28, 26,24,22,20,18,16,14,12 Whitworth form.
 
Sorry to say I haven't used them yet but my current projects will soon need some screw threads. ( Thats if I don't screw them up first!!)
 
Regards
 
Norman
Speedy Builder522/06/2011 19:58:17
2878 forum posts
248 photos
Tracy tools have been helpfull as I did not see that there are 3 different sets available using their web drop down menue. The third set is as follows, and I posed the following question to Tracy tools:

Please could you tell me if the 20,22,24 ....56,60,72 range of chasers are whitworth ie ME and Brass profile,
Tracy tools reply:-
To be honest it’s really a mixture of UNS and WHIT FORM, the coarser threads tend to be whit but as you get up to the 48 and higher it’s mostly UNS, I checked the 32 and 40 tpi and they are both whit form.
(Oh, and those of us that don't know, UNS are Unified form 60 degree thread angle)
 
This suits my purposes, and a such, I am closing this thread.
 
Bob
Ray Pope 111/04/2023 21:56:04
1 forum posts

Does anyone know where I can buy/acquire a BSB (26 tpi) external thread chaser. Application is for male and female 7/8" BSB threads. Would buy used taps and die if available. Have a 7/8" no.1 tap. Thanks in advance.

Ray Pope

DC31k12/04/2023 08:48:23
1186 forum posts
11 photos
Posted by Ray Pope 1 on 11/04/2023 21:56:04:

Does anyone know where I can buy/acquire a BSB (26 tpi) external thread chaser.

Use a 1/4" BSF Coventry die chaser held in a pair of mole grips. Pitch and form are correct.

https://101tooling.co.uk/product/coventry-die-head-chasers-imperial-bsf/

JasonB12/04/2023 08:56:35
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25215 forum posts
3105 photos
1 articles

12years on and Tracey tools still do the chasers including 26tpi

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