Member postings for David Davies 8

I remember the trailing leads from light sockets too.

The only issue is that there is no earth connection, so running lathes, irons etc from same is at the user's risk!

Dave

Thank you DC31k for taking the time to reply and providing the link to the lathe manual.

It is now obvious what went wrong, we retained the 18T gear as the driver and substituted the 36T as the driven.gear.

We will try this out when me meet at the 'man cave' next Thursday.

BTW, Stud and Screw gears are the terminology used by Boxford on their machines.

Cheers

Dave

Yesterday we encountered a problem whilst attempting to cut a 4.5 tpi thread. the machine is an old round head Triumph with an imperial / metric quick change gearbox (selectible via another lever) and a 4tpi leadscrew.. When the appropriate selections from the chart were made, A and C on the two no, two position levers and the last but one position to the RHS on the sliding lever the thread was not 4.5 tpi.

The stud gear is 18T, the idler 120T and the screw gear is 36T.

Can anyone confirm whether this is the correct gearing? We don't have a manual for this lathe unfortunately.

Thanks

Dave

Corrected the idler though this doesn't influence the ratios.

Edited By David Davies 8 on 08/09/2023 21:29:34

Try Drill Service, Horley but sit down first.

HTH

Dave

Danny

Trikit make tricycles and used to make rear axle conversions It may be worth asking the proprietor Geoff Booker [email protected] what material he uses.

HTH Dave

Larry Phelan wrote:-

Does anyone remember the locking ring on the bottom bracket of old style bikes [1940/1970.] ?

Seem to recall that one of them was left hand thread.

Classic British bicycles have their bottom brackets tapped 1.370" x 24tpi. The fixed cup which is fitted on the chainwheel side is left hand thread.

The adjustable cup and its lock ring are right hand thread.

Pedals differ as well. The chainwheel side one is RH thread and the other side is LH thread.

Time to go out for a ride I think!

Dave

EKP supplies of Barnstaple, Devon list imperial PGMS, EN1A grade, up to one inch in diameter.

Usual disclaimer.

Dave

Hi George

I am rebuilding a mk 1 (very slowly I'm afraid). The flat belt I bought for it is a H1120-25. This is 1120mm long and 25mm wide The H signifies 1mm thick. Mine is an ''Optimax'' made by Optibelt GmbH in ''The Fatherland''

HTH

Dave

BTW other lengths are available, can you check your machine by looping a measuring tape around the pullies?

Edited By David Davies 8 on 23/04/2023 18:42:22

Edited By David Davies 8 on 23/04/2023 18:43:24

Good morning all

Thank you for all your replies.

I like Bernard's method, Any excuse for a barbeque is good by me!

Cheers

Dave

Hi

I have some Kasenit powder which I intend to use on a part that i want to make.

It occurred to me that I have both EN1A and EN1A Pb (ie leaded) steel.. Will the process work with leaded steel or should the EN1A be used.

I know that leaded steels are not suitable for welding, this made me wonder about case hardening.

TIA

Dave

Roy Entwistle wrote:-

You can get wire brushes for cleaning shotgun barrels from any gunsmith. There are brass ones and steel ones. There is a screw thread on them but I can't remember what it is

I use Bisley 12 bore shotgun brushes to clean MT sockets. They are threaded 9/32 BSF (just to be awkward)

Mike Poole (moderator) suggested them many moons ago.

HTH

Dave

If you want to see one in action have a look at Mr Crispin's channel on Youtube.

He does not use the MT in the tailstock barrel but has made a sleeve to clamp the diehead and tailstock barrel together thus eliminating the risk of the DH pulling out of the tailstock socket.

HTH

Dave

Hello Peter

Have you tried emailing Steven on "microstoc at hotmail com"?

HTH

Dave

I have just noticed that his site has not been updated since February last year.

Edited By David Davies 8 on 06/03/2023 17:53:50

Found this on the 'net.

A mathematician named Klein
Thought the Möbius band was divine.
Said he: "If you glue
The edges of two,
You'll get a weird bottle like mine."

I'll get my coat.

Dave

Simon

Thanks for showing the component parts, you have made yourself a very useful bit of kit!

Cheers

Dave

Hi Simon

A bit off topic, is your rack system made to a published design, if so which one, or did you blaze your own trail? Also is the pinion housing a casting, fabricated or hewn from the solid. I have often looked at these devices with envy.

Cheers

Dave

I remember Maggie Philbin of Tomorrow’s World coming to Dagenham Engine plant in 1982 to see the. OHC Pinto engine hot test area. I never knew we had so many people in the maintenance dept whose duties included covering the hot test area.

Dave

Sono solo due fili e un secchio di terra sai!

Doubt if this helps a great deal.

Dave

BSI (Bob Smith Industries) Epoxy gets good write ups in model railway forums (fora?). Different setting times are available and it’s on sale at Fleabay.
HTH

Dave

I suggest that you join either the Sunbeam OC or the Vintage Motorcycle Club. These clubs will give you all the advice you need an be able to point you in the direction of specialist spares stockists.

HTH

Dave

Oops! Can’t delete the duplicate post. 

Edited By David Davies 8 on 15/01/2023 20:17:48