I have a 6 page pdf of instructions for models HR 1 & 2, but not sure how to attach it here, or even whether they are applicable to your model.
Feel free to PM me with a real email address and I’ll pass them on.

I think I have the same head as you, but I’m not in the workshop at the mo, and wont be for an hour or two

Bill

On 30 October 2023 at 14:31 Dave Halford Said:

Many thanks Bill,

PM sent

They sound a little different as there’s no ball bearing nor grease nipple and mines rated from 12BA to 1/4 whit. Not sure how it can drive a 1/4whit and not break a 12BA.

I’ve just realised that the instructions I have for the HR 1 & 2 are actually for a Taco head; It’s just that I had them stored in my Ackworthie folder.
I’ll still send you a copy, though it looks like they are a different gizmo altogether.
I bought mine for a tenner, as it came without collets.
Maybe now is the time to try inserting a youtube video 🙂
Not really a repair, but does show a bit of detail.

In also have now picked up a benchtop Herke Tapping machine which recons to do 9BA upwards, so not used the Ackworthie of late

p.s. no PM received yet, as of 14.47

Bill

I bought a SPV tapping head at an auction some years ago , it was not very good & slipped badly + no collets. I did a full youtube video on stripping & repairing it. I also 1st made some collets from delrin which were not very good. I then made some from alloy & split them for better grip. It works quite good now. Since then I was given a nearly new Tapmatic with all the rubber collets which is superb.

Steve.

https://youtu.be/luz1obGwiDE