Forum sponsored by:

Seagull

Gudgeon Pin fit

Search for: in Thread Title in

Graham Williams 5	30/10/2011 17:56:28
98 forum posts 9 photos	Just made the pistons for this engine (in cast iron as no Alum available) and have drilled and reamed the gudgeon pin holes to nominal 3/16" as per drg. Con rods also show little end as 3/16" dia and rod is shown as having what I presume is an oil hole drilled to lube the pin. Now what I'm unsure of is this :- should the pin (case hardened MS) rotate in the piston when running and perhaps in the con rod or should the pin be fitted tightly to the piston (perhaps by warming the piston ) as in my old M/bikes? or does it matter at all. Advice appreciated.
Stub Mandrel	30/10/2011 18:51:00
4318 forum posts 291 photos 1 articles	Push fit in piston, rotate in con-rod. - stops it moving sideways as I understand it Neil
Graham Williams 5	31/10/2011 10:07:40
98 forum posts 9 photos	Thanks for the replies, had a look at Graham Meek's page was most interesting. As the drg shows end pads I'm going to make the pin fully floating as Graham's. Cheers Graham W
Graham Williams 5	02/11/2011 15:48:05
98 forum posts 9 photos	Hi Robin. Errr no didn't clock that they were hollow dowels, what advantage would that give ? lightness I suppose. What I did see tho' was the pistons which must be a whole lot lighter than the ones I've made so we'll see what mine revs out to and perhaps vibrates like when all finished. Cheers Graham W

All Topics | Latest Posts

Please login to post a reply.

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

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts

hemingway ball turner
04/07/2025 14:40:26
*Oct 2023: FORUM MIGRATION TIMELINE*
05/10/2023 07:57:11
Making ER11 collet chuck
05/10/2023 07:56:24
What did you do today? 2023
05/10/2023 07:25:01
Orrery
05/10/2023 06:00:41
Wera hand-tools
05/10/2023 05:47:07
New member
05/10/2023 04:40:11
Problems with external pot on at1 vfd
05/10/2023 00:06:32
Drain plug
04/10/2023 23:36:17
digi phase converter for 10 machines.....
04/10/2023 23:13:48
More Latest Posts...
View All Topics

Support Our Partners

Shopping Partners

Subscription Offer

Latest "For Sale" Ads

Reeves** - Rebuilt Royal Scot by Martin Evans
by John Broughton
£300.00
BRITANNIA 5" GAUGE James Perrier
by Jon Seabright 1
£2,500.00
Drill Grinder - for restoration
by Nigel Graham 2
£0.00
WARCO WM18 MILLING MACHINE
by Alex Chudley
£1,200.00
MYFORD SUPER 7 LATHE
by Alex Chudley
£2,000.00
More "For Sale" Ads...

Latest "Wanted" Ads

D1-3 backplate
by Michael Horley
Price Not Specified
fixed steady for a Colchester bantam mark1 800
by George Jervis
Price Not Specified
lbsc pansy
by JACK SIDEBOTHAM
Price Not Specified
Pratt Burnerd multifit chuck key.
by Tim Riome
Price Not Specified
BANDSAW BLADE WELDER
by HUGH
Price Not Specified
More "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