By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for Pete Rimmer

Here is a list of all the postings Pete Rimmer has made in our forums. Click on a thread name to jump to the thread.

Thread: ML7 left to run for 72hrs accidentally - what to check?
28/01/2021 11:43:37

I would not worry overly much. If any of the bearings had suffered lubrication failure you would have come back to a seized spindle or smouldering mess.

All I'd expect is a little bit extra normal wear. Not so much of that either since plain bearings are happier once warmed up a bit.

Thread: Cracked motor mounting plate
28/01/2021 11:34:12

I would span that crack with a piece of mild stel plate and some screws or bolts. If I was absolutely hell-bent on welding it rather than plating it with a doubler I would either silver solder or tig braze it.

Thread: Lathe Chuck backplate
26/01/2021 20:57:08

I have never worried about the register being any thicker than is required to register. Come to think of it, I rarely bother to make the register a snug fit. Perhaps on a 4-jaw but not on a 3-jaw. I like the facility to adjust the part a few thou if required.

My 8" TOS everyday chuck has no register at all.

Thread: Motorcycle General Discussion
21/01/2021 00:19:31
Posted by Peter Jones 20 on 20/01/2021 00:10:38:

There was an issue with the starters though as the location could easily be 'off', alignment was by a rather loose 6mm dia pin on crankcase. Startrer motor would move just far enough to disengage then shred teeth off both parts, lock up and break nose off starter. I still have a broken 'nose' here somewhere, maybe I'll post some pics?

Yep, I've both wedled the starter nose bolt lug and repaired the ring gear on one of mine. The ring gear teeth were missing about 1/3 of the tops in a couple of places so I carefully mig-welded the tops of the teeth, turned the OD  then dressed a grinding wheel to the tooth form and ground them back into shape.

Edited By Pete Rimmer on 21/01/2021 00:20:19

19/01/2021 22:29:09
Posted by Peter Jones 20 on 18/01/2021 19:10:46:

Personally I liked the BMW telelever for chasing around, it handled better than the GSX-R1100 up to ~130 ish on 'B' roads.

Is that because 130mph was about all any bike fitted with telelever could ever manage?

I'll agree about the handling though I'm on my third tele-lever bike.

Thread: Ethanol
19/01/2021 22:13:45
Posted by Michael Gilligan on 19/01/2021 20:34:06:

Realistically priced, high quality Isopropyl Alcohol is available here:

**LINK**

https://www.ebay.co.uk/itm/IPA-99-9-1-LITRE-Lab-Grade-Isopropyl-Alcohol-Isopropanol-1L/141522873981

Well packed and promptly despatched too star

MichaelG.

No it ain't

This item is out of stock

Thread: Chuck fitment to dividing head
18/01/2021 23:25:51

You could remove the spindle from the dividing head and single-point the thread, so long as it's not hardened.

18/01/2021 18:40:19

Offer the dividing head spindle thread up to the South bend spindle thread. If the pitch is the same then the threadform must be different. Get a 1.5" - 8 TPI UNS die and run it down the thread on the dividing head, then your chucks will fit, and so will any Whitworth ones.

Thread: Myford ML7 4 way tool holder
17/01/2021 17:38:50

Beware if you skim too much off the base the tool support can bend down when you clamp the tools. I once had a toolpost where this had occurred.

Thread: Spur gear help.
15/01/2021 18:15:32

Those are 10DP gears, but you don't have to use 10DP, you could use 20DP (myford) gears and double the tooth count, or any other DP that will achieve the 2.40" centre distance.

Thread: Hardinge HLV-H
15/01/2021 14:53:32
Posted by stuart froud on 15/01/2021 14:24:03:

We have 2 Hardinge Super Precision manual lathes:

S/N KL1-2124

S/N HLV-H249

With the follow issues:

  • Feed not working
  • Screw cutting feed selection knob broken
  • Top slide locking cam shaft broken
  • General service required

Looking to find someone 'handy' as recently understand from Hardinge in Europe that they do not have any one in the UK, plus parts/spares a bit limited.

Ideally the sooner the better

Many thanks.

The top slide locking cam breaks because the top slide base is prone to becoming bowed which causes unwanted rotation of the slide under load so it requires more and more clamping until the cam bolt shears. Ask your operator if this has been the case? This will require scraping of the top slide, and a new cam bolt made, as I have done on mine.

Feed not working I take it is the electrical feed to the carriage from the tailstock control? That would need diagnosing as would the feed selection knob (i.e. is it just the knob or the selector behind). Neither should pose too much of a problem to a competent person.

Thread: Worm wanted for lathe
10/01/2021 22:49:17

The hole with the spring in it. The pin should be a good fit in there.

10/01/2021 17:29:55

Looks like the hole in the lever is much larger than the pin. I would be turning a bush to make it a good sliding fit. Or make a new pin to fit the hole.

Thread: Clarke CL250M Metric Screw Cutting Gears
10/01/2021 11:56:17

The way I'm reading it, is that Ian finds that he is unable to mesh the 48 of Z2 with the 24 of Z1 without the 40 and 42 fouling each other.

I'm not familiar with the machine but the obvious solution would be to flip Z2 over so that the 40 is on the outside. It would probably require a spacer behind the carrier, and Z3 would also require a spacer so it lines up with the 40T of Z2.

Edited By Pete Rimmer on 10/01/2021 11:56:34

Thread: Worm wanted for lathe
08/01/2021 22:00:06

The M300 at your work will cut that worm if you set it to 23TPI (C5SY) and swap the 88 and 44 gears around.

08/01/2021 21:14:57

It says 18DP right there on the drawing and the mating wheel is drawn as18DP 33T. The 5.75TPI and .174 lead are a little at odds with each other (0.17391 vs , 0.17450) I guess that they calculated half a thou per pitch is close enough.

Certainly, the engagement mechanism seems to be hit-and-miss enough to allow for a much wider error.

Thread: Hardinge HLV-H
08/01/2021 19:35:03

What sort of work needs doing to the machines Stuart, and over what time frame?

Edited By Pete Rimmer on 08/01/2021 19:35:11

Thread: Worm wanted for lathe
08/01/2021 19:32:21

Well, given that the kind gentleman has pointed you to the correct drawing on the Denford forum:

You now have all the info to produce your worm. Bonus if you can find a lathe which has 5 3/4TPI on the gearbox.

CVA has that pitch on the gearbox as does my Monarch.

07/01/2021 23:54:02

Yes it does look as if it's only achieving half engagement. I wonder if the stops on the rotary lever can be adjusted? Might interfere with the operation of the threading interlock, if it has one, or knowing Denford they might have used the interlock AS the stop.

07/01/2021 23:27:30

Looks like both original parts are cast iron. I see no reason why you couldn't make them from mild steel though.

For a permanent fix you could do a number of things:

Make a new worm and a new wheel to the original sizes.

Make a slightly larger worm and re-cut the wheel with a 1-off form cutter. Depending on the condition of the wheel it might only need cutting 10 or 20 thou deeper then you can increase the PCD of the worm the same amount.The wormwheel cutter would have to be the same OD as the worm itself and you can make it from a hardenable steel, using the 2-button method to get close to the correct form. Then you'd have to set the cutter at the helix angle, index the worm for 33 teeth and plunge-cut each tooth in turn. It's not as difficult as it sounds just a bit of work.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Support Our Partners
JD Metals
ChesterUK
cowells
emcomachinetools
Warco
Eccentric July 5 2018
Eccentric Engineering
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest