Member postings for Robert Hodgkins

Hi Guys

Thanks for that. I'll check out the Clicksprings on you tube.

Thankfully I have only machined one end of the arbor at the moment. There is only a very minimal amount of play on the main wheel. I have not started attacking the frame arbor holes yet.

Regards

Bob

Hi Guys

I am just finishing the main wheel and barrel of my JW 8day clock. I did turn the barrel arbor down to 5/16" on the ratchet end as per the drawing. I have reamed the hole in the main wheel to 5/16" as described by JW. The problem I have now is after burnishing the arbor its .003" undersize. Should I have allowed for this when turning and made it oversize?

I have read on the forum that we engineers make things tight, am I worring too much or will I have to remake it?

Thanks

Bob

Hi Guys

Ok I am working to the "How to make A Weight Driven 8-day Wall Clock (updated)" book from Ian Cobb.

I have made the Frames, Pillars and Barrel. I have just plunged into cutting the ratchet teeth. I really should hve read the script before posting. Sadly I just looked at the diagram and just saw 3/32" and assumed I needed that size blue pivot steel. I have now read in a bit more detail and I can whats required. I was just trying to put a materials order together for what was coming up.

I am currently working on the main wheel but have run into a snag. I made a Aluminium arbor which I turned up on my Cowells Lathe. I stuck the blank to it with super glue and turned it all to size drilled and reamed 5/16". I have to cut my gears on my Warbeco milling machine. I have a divisionmaster with a 4 jaw centering chuck. When I transferred the arbor to the mill I loose concentricty. Its only a few thou but I'm not sure what my tolerences are as I have never made gears before. I think I am going to buy a 14mm rotary table adapter so I can just move my cowells 3 jaw with the Ally arbor in it to see if it improves things.

The black art of clock making Lol. But I am enjoying the challenge atm.

Bob

Hi Guys

I'm pretty new to clock building. I have just started building JW Eight Day Wall clock. I'm not really ready to make the pivots yet but i was making an order for materials and I thought I would order some blue pivot steel. JW's book says 3/32" but I see that is not readily available now. What size should I go for 2.5mm?

Thanks

Bob