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Member postings for martin perman

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

Thread: Class 22 Diesel (next project)
29/01/2021 20:15:57


For a while I thought you were making a West Coast class 57, similar colour but i'm better now smiley

Martin P

Thread: Rufforth Metal Man
26/01/2021 17:35:50

Martin P

Thread: Communication
18/01/2021 08:25:02

No problem my wife not using Walkie talkies as she spends most of her day in her chair as walking very difficult.

Martin P

18/01/2021 07:48:42

I bought my wife and I cheap walkie talkies, my wife has physical disabilities so cant come and bang on the garage door.

Martin P

Thread: Arc Precision Parallels - Which set?
17/01/2021 13:46:04
Posted by Brian H on 17/01/2021 12:50:47:

I bought a set of the thin economy ones and found them to be perfectly adequate for workshop setups.


+1 With Brian, they do what I need nicely.

Martin P

Thread: MEW 300 IS HERE !
12/01/2021 17:42:18


On the Radio 4 one oclock new today the Post office announced that they have 28 area's in the UK including Northern Ireland where they are struggling with deliveries, apparently due to staff shortages, Covid related and major increase on internet shopping.

Martin P

Thread: Clarke CL500M longitudinal feed screw
09/01/2021 21:51:34

How do you mean, this is the underside of the traverse lead screw, showing the guard from both sides of the traverse which also shows how its mounted.

Martin P

09/01/2021 20:43:26


As promised pictures of the guard for the lead screw, very basic but it does the job.



Hope this helps,

Martin P

Thread: MEW 300 IS HERE !
07/01/2021 14:27:36


Martin P

Thread: Clarke CL500M longitudinal feed screw
04/01/2021 18:50:50


The ones fitted to my lathe are mounted above the lead screw and are attached to the traverse casting either side and are held in place by one screw each, they are a length of metal sheet about 5" long covering the leadscrew, they are not shown on the drawings, something else for me to remember I will photograph them on Thursday and PM you them, part time job and other duties dont allow sooner smiley

Martin P

04/01/2021 18:03:00


Edited By martin perman on 04/01/2021 18:03:41

04/01/2021 18:01:56


The cross slide uses the same adjustment, I regularly squirt oil along the leadscrew, do you have two metal gaurds fitted to the traverse casting covering the leadscrew these keep most of the muck off the thread.

I've just noticed you asked for the name of my VFD, I will pm the details.

Martin P

Thread: PAT - Portable Appliance Test
01/01/2021 19:00:14

I worked for a company that supplied ventilation cabinets that were a couple of hundred kgs each and portable as they were moved from Lab to Lab and they had to be PAT tested, one unit failed so I rang the manufacturer my Italian bosses and they asked how long the power cable was, when I told them the answer was shorten it by 1.5 meters and get it re tested, I did this and it passed.

Martin P

Thread: Gloves and machine tools - my stupidity.
01/01/2021 11:39:01

In my last job before retirement I used to spend a lot of time on building sites installing industrial washing machines, we installed the machines and the builders constructed the buildings around them, if you were caught without gloves on you had a formal warning, if you were caught doing it again your company was requested you were removed from site, you try wiring up control panels with gloves on its bordering on impossible.

Martin P

Thread: Help setting up Clarke 500m
27/12/2020 15:58:47


Re threading, from experience I would suggest you do the following, obviously select the correct gears for the TPI, set your chuck speed to the minimum rpm of 200 and when you place your metal in the chuck give your self plenty of space between the end of the thread and the chuck because your going to do three things very quickly 1. stop the lathe 2. wind the crosslide back away from the job, remembering how many turns you wound the crossslide back and 3. put the lathe in reverse and send the saddle back to the beginning remembering not to disengage the saddle feed.

Betwwen 1 and 2 you will be amazed how far your tool will travel towards the chuck whilst coming to a stop.

I have gone down the VFD route because 200 rpm is to quick, I've not fitted it yet but its fairly straight forward.

Martin P

27/12/2020 11:30:05

from your picture you are taking apart the compound slide which as you say you can adjust 360 deg, the cross slide is the one the compound slide sits on and moves away from you.

Another source of backlash of sorts is the actual dial assemblies, each one in the blue blocks with the oiling points has a grub screw underneath which engages in a slot in the lead screw shaft, the grub screws work loose which allows the dials to move away from the blocks, I put loctite retainer on the grub screw to stop it undoing.

Martin P

27/12/2020 09:30:40
Posted by Stuart Cox 3 on 26/12/2020 16:56:30:
Thanks Howard for the detailed advice, it's very much appreciated!
I'm happy to work with the back lash if it is acceptable. I have Neil Wyatts book and also another by Harold Hall which I'm finding really useful 👍

In answer to some of your questions......

The material was a good 2" in to the chuck although has a bit of light surface rust (may be that) it was just a piece of bright steel I had lying around

By using a DTI as far as I can tell the chuck is aligned correctly.

The headstock bearings are new and seem to be correctly adjusted (tapered roller type)

I was taking 0.5mm per cut, feeding slowly by hand with a brand new tool which cut very well, no effort required, nice clean chips etc. I did try a 1mm cut which it also coped with very well

I centrered the tool using the feeler gauge between the blade tip and the material method which seems to work fine

I did notice when using the Cross slide to feed the cutter along the material if I did wind too aggressively the QCTP holder seemed to almost jump a little!? One question I have ref the QCTP holders, what is the nut on the top of the height adjuster for? I tried winding it all the way down but it doesn't seem to do anything ie, doesn't seem to lock the height adjuster??

I wasn't turning between centres and had approx 50mm of material protruding from the chuck

I think as the saddle feed seems to cut without taper suggests the headstock is aligned with the bed and the problem lies with the Cross feed alignment. I did have to adjust the gib strip on this so may have adjusted unevenly?

I will have another play with it tomorrow. Overall I am very pleased with the machine, I'm just trying to follow peoples advice and get it set up correctly

Thanks again



Re the crossslide, may I suggest you take it off to gice the slideways a good clean, to do this loosen the Gib strip screws and the wind the cross slide to the rear of the bed until it stopsthen the slide will move easily off the lathe, be aware the crossslide nut may drop out from the underside of the slide, its a good fit but maybe loose, its not fixed and allowed to float, give all of the parts a very good clean including the Gib strip. Give everything a good dose of oil and reassemble but before you do screw the cross slide nut onto the thread and check for slop, there is a small screw to close the thread and reduce the play, this will reduce the backlash. the reason I suggest this is the slide way does not have a lot of protection from swarf and some may get in to the ways.

Martin P

Thread: New DVD Player/hard drive recorder
23/12/2020 11:00:28


I worked in the injection molding industry for a while installing robots onto Moulding machines, one factory I worked at made televisions, they supplied the likes of Curry's etc and good named manufacturers but they were all the same cabinets with all the same interiors, like cars and vans it was and maybe still is badge engineering so how do you know, maybe the top end ones had different functions which were blocked at the cheap end, who knows.

Martin P

Thread: Value opinions for used clarke CL500M
23/12/2020 09:37:26


I bought mine second hand from a company I worked for, it was bought for light machining but never used, it had a few extras like steadies, face plate and four jaw chuck, it also came on its original stand, I moved from my van into my garage using an engine hoist, I've had it at least 15 years and used it for making and repairing my stationary engines and recently for making parts for fixtures on clocks.

Its more than accurate for my purposes and I dont see the need for upgrading it for something "better", I'm currently about to start fitting a new motor and a VFD as its slow speed is a bit quick, as suggested adjust your gib strips but first replace your grup screw for longer ones so that you can fit half nuts to lock the screws in place.

I have never used the mill only because I have a mill drill and small horizontal mill in working order.

I've made several things on the machine and happy with its accuracy and finish, I never put anything on display here as none of it runs on steam and is shiny laugh

Martin P

Thread: Cutting copper tube square
21/12/2020 08:49:13
Posted by Martin Connelly on 21/12/2020 08:44:33:

I don't think there was a problem with a pipe cutter if you have one that will do that diameter. Most other suggestions were ways of doing it without spending money on a tool that will only be used once.

Martin C

thanks for that, I'm not a plumber but as someone who used pipe cutters as part of his job I just assumed we all had one.

Martin P

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