Hoffman dividing head

This topic has 14 replies, 6 voices, and was last updated 1 September 2020 at 22:21 by Bob Birkett.

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29 August 2020 at 18:52 #493374
Bob Birkett
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@bobbirkett74087
Hi

Does anyone out there have a schematic of the small Hoffman dividing head please? The plunger pin on mine is broken. I must be missing something simple but I cannot find a way to dissemble it. Any diagrams would be greatly appreciated.

Thanks in advance.
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29 August 2020 at 18:52 #27602
Bob Birkett
Participant
@bobbirkett74087
Index pin
30 August 2020 at 13:21 #493431
Thor 🇳🇴
Participant
@thor
Hi Bob,

Welcome to the forum. It seems Hoffman is still in business, have you tried to contact them? Lathes.co might have a manual.

Thor

Edited By Thor on 30/08/2020 13:25:15
30 August 2020 at 17:04 #493449
Tony Pratt 1
Participant
@tonypratt1
Pretty sure there will be a cross pin holding it together.

Tony
30 August 2020 at 17:23 #493454
Bob Birkett
Participant
@bobbirkett74087
Thanks Thor. I'm awaiting a reply from them, still.

Tony, thanks also. I have extracted the top pin that holds the outer shell in place but there doesn't appear to be anything other than magic holding it together beyond that. I'm going to make one and then Mr and Mrs angle grinder will make a visit and report back for future handle lovers.
31 August 2020 at 10:49 #493505
Neil Lickfold
Participant
@neillickfold44316
Can you post some pictures of your assembly please. I repaired one recently, and want to make sure it is the same model.

Neil
31 August 2020 at 17:26 #493563
Bob Birkett
Participant
@bobbirkett74087
'Can you handle it'

is the albums name Neil.

Thanks
31 August 2020 at 22:13 #493613
not done it yet
Participant
@notdoneityet
There might be an outside chance that the piece shown is one piece? If so, it may be a case of machining away the broken tip and replacing with a new one. Not a great issue, I would have thought?

I expect you may need to be seated if it is one piece and needs replacing by the manufacturer. I know of at least one tool supplier that offers ‘kits’ for around £35, but are likely metric, these days (and likely of lesser quality).
1 September 2020 at 08:50 #493642
Neil Lickfold
Participant
@neillickfold44316
There is a wire clip that stops the plunger coming out. You need to remove the wire clip, then it will come out the bottom. That is how our one is.
1 September 2020 at 20:22 #493764
Bob Birkett
Participant
@bobbirkett74087
Thanks Neil. I appreciate you taking time. I know which bit you are talking about.
1 September 2020 at 21:06 #493773
Mark Davison 1
Participant
@markdavison1
I have one and dismantled the same bit earlier this year, for a different failure though. Does this help?
1 September 2020 at 21:28 #493777
Bob Birkett
Participant
@bobbirkett74087
Brilliant pic Mark. How does the plunger (part 3 from the top) fit into the body (part 2)? Is it pressed? Do you have a pic of the right hand side, as we look. of both those parts please.
1 September 2020 at 22:03 #493781
Mark Davison 1
Participant
@markdavison1
Pinned and pressed
1 September 2020 at 22:13 #493783
Mark Davison 1
Participant
@markdavison1
Ignore the small off centre hole in the top of the 2nd part down. I had to drill that to knock the remains of a broken locating pin out.
1 September 2020 at 22:21 #493785
Bob Birkett
Participant
@bobbirkett74087
Fantastic. Thanks Mark. I'll take a look.
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