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Parslow skeleton clock – part 1 – The Pinions

It is now late January 2013 and back in November, I purchased the plans and brass for Parslows skeleton clock. After having a son born in December, I expect I can be excused in beginning this build!

I’ve made lots of plans in my head about this build and actually I’m currently insistent on trying to build two of these clocks at the same time. My plan is to stick to the plans on ones clock and try and be a little more flexible on the second clock, possibly CNC frames and a more different look to the original.

I wanted to try the hardest part first, the pinions. I used some 8mm silver steel, turned it down to 5.69mm OD. I put the full cut on of 1.49mm and at low speeds of about 120rpm, started cutting with lots and lots of oil and a slow feed. The steel was not supported by a tail stock and so under the microscope, you can see slight vibration marks. A lot of hard work in polishing these pinions has started to bring any marks out the pinions nice and clean. The end has been centre punched a touch too far, so I’ll need to turn a couple of mm off the end before I drill and ream then part each pinion to size. I’ve turned up 1″ of pinion so have enough to make quite a few of the 8teeth that are called for however will need to make another lot up. It would be nice to try a tail stock but a. I don’t have one for my 4″ vertex and b. the tail stock and centre would get in the way of the cutter without some thought,

Anyway, the fruits of this evenings labour.

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3 responses to “Parslow skeleton clock – part 1 – The Pinions”

  1. B Ramsdale says:

    Hello Chris the pinions look fine but I think several small cuts would be advisable.Choice of silver steel is I feel a mistake use EN8 (high carbon which hardens and tempers nicely and cuts much easier)YOU COULD ALSO TRY en24t this has already been tempered but is tough to cut> The floor looks good CNC machines take all the fun and cock ups out of making .What finish did you use?what does URL stand for keep up the good work Regards B

  2. Raynerd says:

    Many many thanks for the time taken in replying. I will of course take note of your advice and will change the pinion steel! The floor turned out well and agree that the CNC inlay was a cheat, but I lack woodworking skill and at the moment, I’m just trying to get half decent at metal work!! The finish was a mat oil wax blend…looks quite nice!
    Chris

  3. Steve Richardson says:

    Pretty cool stuff! I work with some real talented machinists and they are gonna dig your website!

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