Model Engine Maker

Supporting => Engine Ancillaries => Topic started by: Steve Crow on April 01, 2021, 04:13:25 PM

Title: Home made screws
Post by: Steve Crow on April 01, 2021, 04:13:25 PM
I got a few samples of M1.2 screws for a project and wasn't happy with the quality or material so I decided to make my own. I would have to turn down the head and shorten commercial screws anyway.

It went a lot quicker than I thought. Once I had worked out a "mass production" method I made around 40 ( I need 80+) before running out of silver steel. That took about 6 hours workshop (kitchen table) time.

Here is one on a penny.

(https://www.model-engineer.co.uk/sites/7/images/member_albums/163849/891694.jpg)

This is unfinished - it still needs chamfering, polishing and blueing.

I'm quite happy with the result.

Steve
Title: Re: Home made screws
Post by: crueby on April 01, 2021, 04:33:51 PM
Very nice!  And tiny. How did you cut the threads, single point on lathe, die?
Title: Re: Home made screws
Post by: EricB on April 01, 2021, 05:29:15 PM
Great work! If you can make your own hardware you can build anything. What did you use to cut the slots? I've used a jewelers hand saw in the past but I'd like more consistent results.

I made the ones shown below to restore a clock several years ago.

Eric
Title: Re: Home made screws
Post by: bent on April 01, 2021, 06:08:38 PM
Nice.  I bought a bunch of hex stock awhile back, and plan to use it making hex bolts and nuts for various projects.
Title: Re: Home made screws
Post by: zeeprogrammer on April 01, 2021, 09:11:02 PM
Being able to make my own bolts, nuts, washers, etc. is, I'm not sure how to express it, 'the ultimate?', 'symbolic?'. Certainly satisfying.
It's part of "I have a shop! I can fix things! I can create things! I can put things together! Perhaps more than making any other part.

And I don't have to wait for an order or go to the store and buy a dozen when I need one.

P.S. I use a slitting saw to cut the groove. At least, so far.

Nice job Steve. Good post.
Title: Re: Home made screws
Post by: Mcgyver on April 01, 2021, 11:35:05 PM
Nice work!

When you've got some turret lathe stuff it creates a strong compulsion to make fasteners.  :).  They take forever to set up, including making lots of tooling, but when they are ready, man can they crank it out!

I make my own fasteners, sometimes, if its not available, a long wait or I feeling particularly cheap (all too often!).  The formulae for a good model engineer might be a decent machinist with a dogged determination to survive tedium.  Spent all last weekend making little valve parts, 30 sets.  Extremely tedious but I'm still here so I must be getting better at model engineering :)
Title: Re: Home made screws
Post by: Steve Crow on April 02, 2021, 10:08:33 AM
Very nice!  And tiny. How did you cut the threads, single point on lathe, die?

I bought a Russian made M1.2 thread roller on ebay for 13.01 inc. postage from St. Petersberg. Fantastic value for money.

Steve
Title: Re: Home made screws
Post by: RayW on April 02, 2021, 11:03:57 AM
Nice work Steve. Very satisfying when you can make your own screws and nuts, especially at such small scale.
Title: Re: Home made screws
Post by: iRon on April 02, 2021, 02:46:12 PM
Very nice work. I am envious!
Ron