Knurler’s Bad Day

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Knurler’s Bad Day

This topic has 21 replies, 16 voices, and was last updated 4 December 2016 at 17:15 by Ajohnw.

Viewing 22 posts - 1 through 22 (of 22 total)

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1 December 2016 at 22:44 #269447
PaulR
Participant
@paulr
I think this guy had too much of the old Baijiu, one of the knurls runs right off the top of the screw and the screws wobble more than he probably did. I actually laughed out loud until I remembered that I had handed over hard-earned money for this 'workmanship'.
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1 December 2016 at 22:44 #34797
PaulR
Participant
@paulr
1 December 2016 at 22:49 #269448
Michael Gilligan
Participant
@michaelgilligan61133
Exquisitey hand-crafted

None of your nasty CNC machining there !!

The spirit of William Morris lives on.

MichaelG.
1 December 2016 at 22:56 #269451
MW
Participant
@mw27036
faithful do some pretty good steel die wrenches of most sizes. I'd try them.

Michael W
1 December 2016 at 23:19 #269456
Hacksaw
Participant
@hacksaw
Child labour ..?
2 December 2016 at 00:03 #269459
jason udall
Participant
@jasonudall57142
All parts inspected.
None rejected.
2 December 2016 at 06:23 #269465
not done it yet
Participant
@notdoneityet
The quality of the holder is clearly apparent. If the die is of similar ilk, the user will not get value for money – however little it may have cost. Unless use once and throw away.
2 December 2016 at 07:13 #269467
Tony Pratt 1
Participant
@tonypratt1
Clearly made to a price, whether it actually does the job will not come into the equation. Buy cheap buy twice etc.

Tony
2 December 2016 at 09:30 #269486
JA
Participant
@ja
Now, that takes real skill! The knurling on the right hand screw is particularly impressive.

An apprentice, a hammer, file and cold chisel, Birmingham comes to mind. Certainly not China or India.

Do the screws have an ACME thread?

JA
2 December 2016 at 13:45 #269543
MW
Participant
@mw27036
Posted by JA on 02/12/2016 09:30:36:

Do the screws have an ACME thread?

JA

It appears to be, as far as I can see. The bad knurl is probably the result of a single sided knurl that has made poor contact, a clamp type wouldn't do this.

Infact, They don't look particularly "lathed" to me, more like a forged or cast kind of look about them, is it possible they did the knurl with a kind of a crimping hand tool?

Michael W

Edited By Michael Walters on 02/12/2016 13:49:06
2 December 2016 at 14:17 #269554
Neil Wyatt
Moderator
@neilwyatt
The screws are probably knocked out by the thousand in a back street workshop in Bombay.

Neil
2 December 2016 at 14:40 #269555
Ian P
Participant
@ianp
Posted by PaulR on 01/12/2016 22:44:53:

I think this guy had too much of the old Baijiu, one of the knurls runs right off the top of the screw and the screws wobble more than he probably did. I actually laughed out loud until I remembered that I had handed over hard-earned money for this 'workmanship'.

Presumably you did not hand over very much money.

The picture appears to show a low cost, badly made, die holder. It probably a cheap import from a non English speaking company (mm shown in capital letters).

The screws will have never been anywhere near a lathe, they look to have rolled threads but I cannot work out whether they were rolled before or after the head was upset.

I doubt the 'Knurling' was done by any rotary process.

If the holder body is usable why not just tap the holes and use some hex socket capscrews?

Ian P
2 December 2016 at 16:09 #269569
KWIL
Participant
@kwil
Thats always assuming that the diameter of the hole is the correct size for a die!
3 December 2016 at 01:44 #269645
Enough!
Participant
@enough
Posted by Michael Gilligan on 01/12/2016 22:49:49:

The spirit of William Morris lives on.

That's funny!
3 December 2016 at 08:56 #269663
Ian P
Participant
@ianp
Posted by Bandersnatch on 03/12/2016 01:44:10:

Posted by Michael Gilligan on 01/12/2016 22:49:49:

The spirit of William Morris lives on.

That's funny!

I agree, he probably meant Maurice Austin
3 December 2016 at 09:01 #269664
Michael Gilligan
Participant
@michaelgilligan61133
Posted by Ian Phillips on 03/12/2016 08:56:34:

….

Whereas that's not funny

MichaelG.

.

Please do your own jokes, Ian

Edited By Michael Gilligan on 03/12/2016 09:23:48
3 December 2016 at 11:13 #269683
Ajohnw
Participant
@ajohnw51620
Ex B'ham apprentices from just about any company were in great demand everywhere.

I take it that it's from India.

Interesting. When the people at Graham Engineering got to know me they always sorted out old stock from India for me rather than where they were getting the stuff from then. Mix of Taiwan and China. All perfect in every respect. I sometimes wish I had bought more – especially die holders. In that line I juts bought a massive tap wrench.

They also produced a number of clone Super 7's. From what I have heard they were rather good even to the extent of using the correct grade of cast iron.

Going on reports on Indian made microscopes they seem to have lost the plot these days. Pity as they see themselves as high tech competitors with the far east. They do seem to be having some success in some areas.

Not sure who Maurice Austin is. If car related all that crap was largely down certain quarters not wanting to make anything in the UK.

John

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Edited By Ajohnw on 03/12/2016 11:14:16

Edited By Ajohnw on 03/12/2016 11:14:45
3 December 2016 at 13:02 #269709
Michael Gilligan
Participant
@michaelgilligan61133
Posted by Ajohnw on 03/12/2016 11:13:13:

Not sure who Maurice Austin is.

.

Ref: Jungle Training Centre

**LINK**

https://en.m.wikipedia.org/wiki/Maurice_Austin

MichaelG.
3 December 2016 at 14:42 #269721
Alan Waddington 2
Participant
@alanwaddington2
Considering the knurls were probably done by a Six year old using 100 year old equipment, working 80 hrs a week for Ten bob a month, i reckon we ought to cut him some slack……
4 December 2016 at 14:41 #269823
Tim Stevens
Participant
@timstevens64731
I bet the knurls were not done by knurling, as we understand it. Rather they look as though they were broached – by pushing them through a die with internal serrations. Hence the result – cock-eyed in = cock-eyed out.

And the threads are rolled, but again on undersize stock. So, make some proper screws and William Morris ( the one who made motor cars for the masses, not posh tat for the rich) will indeed be pleased.

Regards, Tim
4 December 2016 at 15:03 #269825
Harry Wilkes
Participant
@harrywilkes58467
Posted by JA on 02/12/2016 09:30:36:

Now, that takes real skill!

An apprentice, a hammer, file and cold chisel, Birmingham comes to mind

JA

The mention of Birmingham reminds me of some years back when I worked for Elkintons the silversmith's had transfered from Birmingham to Walsall (hence the connection) and every Friday afternoon the apprentice silversmiths would disfigure any silverware that could not be 'repaired' with the above tools mainly the hammer

H
4 December 2016 at 17:15 #269856
Ajohnw
Participant
@ajohnw51620
Must admit I did have a few days practice shaping mild steel with a self made cold chisel. 1 inch wide chamfers. 2 done with cold chisel and 2 done with a hacksaw. About 4" per side and then filed.

Think I preferred the chisel. Surprisingly precise, quicker and easier on the arms except it was my first use of a 5lb engineers hammer. Not much call for them after that.

John

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