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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: Presumably this is done using CNC... but even so its impressive
20/04/2019 20:49:27
Posted by not done it yet on 20/04/2019 02:56:36:

Guessing that uses of these would be injection moulding, diesel fuel injectors and clearly air bearings. Any examples of others?

Do they, I wonder, really need to fit piston rings to F1 engines these days! Although a minute temperature difference between parts might cause interference?

In the sixteen years I worked for Lucas CAV diesel fuel injectors where not manufactured with this method, needles were manufactured using centerless grinders to a nominal dimension the nozzle body was internally ground to a nominal dimension and finished with honing of the bore.

using air gauges the diameter of the needle and nozzles were measured and matched to a very tight tolerance.

Martin P

Thread: What Did You Do Today 2019
19/04/2019 17:06:03


I just did and there is more space because I've transfered the contents of the old work tool bag into two tool cabinets, the shelf for under the bench will be made tomorrow and the only time the space will disappear is when I plonk half of my 20 stone frame on a stool and my legs slide under it smiley

Martin P

19/04/2019 15:32:36

Having sold two of my stationary engines last weekend I now have a space in my garage so yesterday I built a work bench with a storage shelf underneath, the bench is made from a 50mm kitchen worktop and 4" x 2" treated timber.

Martin P


Thread: Hard to please OAPs
17/04/2019 11:06:36


What sort of 4 x 4 do you mean, you may have to add me to the list smiley

Martin P

Thread: Silver Soldering :Good and Bad :Flux sometimes a black mess
16/04/2019 10:35:59

When I click on the link I get my pictures.

Martin P

Thread: Motor mountings
16/04/2019 10:30:46

I would suggest rubber feet to stop vibrations appearing as marks on the job.

Martin P

Thread: Notre Dame
16/04/2019 08:39:54

According to the BBC this morning most of the interior fixtures, art etc had been removed before restoration, the money pledged is now upto 300 million euro's, structurally the stone building is said to be sound, it will rise again.

Martin P

Thread: Poor finish using indexable lathe tools on steel
15/04/2019 21:15:18

I've just finished a project for a friend machining 75mm dia EN1A at a higher speed, 1000 rpm roughly, than you 0.5mm cuts at a slow feed rate and got a good finish.

Martin P

Thread: Which triple expansion engine
15/04/2019 18:55:08
Posted by Matt Stevens 1 on 15/04/2019 18:46:30: far you are swaying me towards the Stuart model! I believe that also is not an easy model to make.

My Grandfather made a Stuart Triple Expansion engine on his Treddle lathe forty years ago so I cant be that difficult to build smiley he ran it in one of his model Tug boats.

My mother still has it as an ornament.

Martin P

Thread: Dialect expressions
15/04/2019 09:38:15
Posted by bricky on 14/04/2019 22:56:09:

Is it a spud clamp.


Its Suffolk for your mouth smiley

Martin P

Thread: Hard to please OAPs
14/04/2019 21:46:09

Is anybody watching Hard to please OAPs, it sort of reminds me of most of us laugh

Martin P

Thread: Bring and buy sale
14/04/2019 20:46:35

I must say that our parish councillor is very good, If I email her with a picture and location of a hole in our village roads the council workers do come within 24hrs to fill the hole but not necessarily repair it.

Martin P

Thread: Dialect expressions
14/04/2019 19:20:28

Many years ago the University of East Anglia went around the Norfolk and Suffolk counties filming and recording the the people particularly the older population to keep the dialect alive.

Anybody know what a Tater Trap is

Martin P

Thread: Bring and buy sale
14/04/2019 17:55:33
Posted by Lambton on 14/04/2019 16:44:11:

The only snag was the deplorable state of the public roads going to and from the sales ground. Endless pot holes and large areas of worn-out surfaces. I came back via Quainton - a most uncomfortable journey. The local highways agency should be ashamed of themselves.

I appreciate that this is beyond the control or influence of the sale organisers.


It must be said that Worminghall Airfield is in the middle of nowhere and like Beds county council where I live in a village priority is on main roads and bus routes, my route via Aylesbury was not to bad.

Martin P

Thread: Dialect expressions
14/04/2019 08:45:20

Pretty accurate for me, I was brought up in south london and live in east anglia and thats where it put me.

Martin P

13/04/2019 17:13:52
Posted by Rik Shaw on 13/04/2019 14:33:12:

Around here "a young old boy" refers to someone who is the same age or younger than yourself.

I int a'gewing = I am not going

Wurny = Wasn't he

A mistake = A Bedfordshire clanger ( and if you have ever eaten one you might know what I mean) laugh


Nowt wrong with the Bedfordshire Clanger, I have one most Saturdays bought from Gunn's of Sandy.

Martin P

Thread: Bring and buy sale
13/04/2019 17:09:48

My friend and I left home at 05:30 this morning to get a good selling pitch, arrived at 06:45 and within five minutes was £150 better off and a lighter trailer by 11:30 when we left I had sold another £100 of engine bits and was a good boy and only bought six rolls of blue paper cleaning material, my wife was happy I didnt come home with another engine.

The money will go towards a VFD to upgrade my lathe.

Martin P

Thread: Hi from Bedford
12/04/2019 13:47:14

Good afternoon John,welcome to the mad house, I live just outside Bedford on the east side, I'm not into Model Engineering per say I restore Stationary Engines to show at vintage rally's, if you need a use of a lathe whilst restoring yours just ask, mine is not large but I've recently machined some 75mm rollers for a friend.

Martin P

Thread: What Did You Do Today 2019
11/04/2019 18:39:27

Having removed two engines from my garage ready for sale this weekend I've spent the last two days building a new bench in the space they took up, I've used 4" x 2" for the main frame but couldn't remember what sizes of ply wood for the bench top there were so I went and spoke to a neighbour who builds Bespoke kitchens and he offered me a 3 metre x 600 mm x 50 mm worktop he had lying around FOC, it will have a steel top when its finished so we picked it up to take over to my house, I struggled to carry my end, so put it down for a moment where upon my neighbour, 30 years my junior, picked it up stuck it on his shoulder and carried it to my yard, oh to be young again.

Martin P

Thread: Aircraft General Discussion
11/04/2019 14:20:23

Ooops to many clicks.

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