Thursday, January 15, 2015

How Lawrie Amatruda Makes Polyurethane Seals.

I received an email from Lawrie Amatruda last week showing how he makes polyurethane seals for air guns:
“I don't know if you have heard of me, my name is Lawrie Amatruda, I am in England UK, I read your great Blogs a lot, I hope you don't mind if I share with you my simple way of making flat section polyurethane seals, I am not an engineer, I'm getting to an age where I would like to pass on any helpful knowledge that I have to aid other DIY airgun enthusiasts to resurrect their old guns , I worked out this method some years ago after not very successfully trying to machine them on my lathe, I do lots of resealing of vintage and antique Co2 and pneumatic airguns for guys here, I hope the pictures are self explanatory.”
“…I believe that obviously from all the information you are giving the collectors around the world the knowledge to restore these older airguns for the next generation, the chance to do the same to their treasured collectables, after all we are only looking after them for future collectors to enjoy. Thank you for referring others to me here in the UK, although I am slowing down a bit now, because of my age, so I am fairly selective with the work I take on, mostly the vintage and antique Co2 and pneumatic airguns”.

000_1017 000_1018 000_1019 000_1020 000_1021 000_1022 000_1023 000_1024 000_1025 000_1027 000_1032 000_1033

Thanks so much for this hard-won knowledge Lawrie!

9 comments:

Brassbanjo said...

Much appreciated!

Some of us amateur airgunsmiths
need all the help we can get!

Now all we need to to know is how
best to make those hollow cutters ;)

Cheers

Brassbanjo

Lawrence Amatruda said...

Hi Brassbanjo, I make the cutters on my lathe from a variety of metals, they just need to be to be thin walled and reasonably sharp, as you can see in the first two pictures they are very simple tools, once you have made a cutter to the size required, you can start the sharpening by putting the cutter in the chuck, and with a fine file to begin with, and finish with a fine diamond hone, alternatively you can use wet and dry abrasive paper of varying coarseness, finishing with a very fine one, when using this method I back the paper with a strip of metal or wood, I hope this explains it. Lawrie.

David Soliman said...

Thanks so much for the info, I had a couple of pretty old E9a pistols that needed seals, now I know how to make them.
Any thoughts on tapered seals, like the ones on spring pistons?

Lawrence Amatruda said...

David, I'm afraid I don't do much work on springers but the ones I have done, have mainly leather washers which have much published information on how to make them, I haven't looked in detail but you will probably find some information here on Nick's blog. Lawrie

phillip swarbrick said...

Hi Lawrie

Do you still service/repair the crossman 600. I have recently acquired an early model that only goes full auto. I would be ever so grateful if you could service this. My email is pip.swarb@gmail.com and my mobile is 07403345243. Many thanks if you can help.

regards
Phillip

SJM said...

Lawrie,
I have an early LP3 that needs an exhaust valve rebuild. Is this something you could help with? The gun is mint apart from this fault. I can be contacted on mobiasstrip at yahoo.co.uk

Hoping you still read old threads :-)

Steve

Steve said...

Lawrie,
I have an early LP3 that needs an exhaust valve rebuild. Is this something you could help with? The gun is mint apart from this fault. I can be contacted on mobiasstrip at yahoo.co.uk

Hoping you still read old threads :-)

Steve

Anonymous said...

Hi, have you find any solutions for your problem?, i have the same problem and looking for same parts.

Leif N

Nick Carter said...

Lawrie Says:
"Leif.
I presume you are referring to the LP3, if so I don't supply parts to reseal these, because I have to customize both the exhaust valve and piston head to make them work, this involves me having the gun to work on, if you are outside of England, UK, I am unable to take this work on because of problems with our postal service, which has made it very difficult to send or receive air guns, I can E-mail pictures to you how I do the work if it would be helpful.
Regards, Lawrie"

Keep up the good work,

Kind regards, Lawrie