Member postings for Alan Jackson

I thank you all for your suggestions and have decided to use Silicon grease with Teflon. I seems to be a bit quieter when running so all is good.

Thank you

Alan

Very nice restoration Mark, it looks new

I am about to regrease my Stepperhead lathe spindle just to check the bearings etc. At present the bearings are lubricated with moly grease, but I just wonder if there is a better choice.

Alan

Fred,

Your whole tractor project is stunning in your execution and just simply brilliant. Wish you every success.

Alan

Edited By Alan Jackson on 28/10/2021 11:06:33

I use this vertical parting tool on my Stepperhead lathe

https://www.youtube.com/watch?v=S8HvS13L7MU

and a rear mounted HSS parting tool on my Chipmaster

Both work well

Alan

Just ask most people what is their height and weight to see how thoroughly they have adapted to the metric system.

I bet a pound to a penny they mostly reply in imperial. That's my two cents.

Alan

I think the reason is that the end of the screw bears on a flat surface that can accept the slight gourging that the end of say an allen type grub screw will leave on the top surface of key. If the grub screw is oriented anywhere else it will score the shaft, making removal much more difficult.

Alan

Hi Niels

If you zoom up on the second photo you can see the screw heads in the chuck bore.

Alan

Hi Niels,

Thank you for your kind comments. The screws are secured by locked screws that can be reached inside the bore.

Alan

Hi Niels,

Re your narrow chuck, here is my own design narrow four jaw 6 inch chuck. The body thickness is 30mm. The jaws are guided by an oval gib that can be adjusted to eliminate slackness in the jaw guidance.

Alan

I have an older Stihl hedge cutter, electric motor driven. The con big ends have plain bearings (no needle rollers) It has been working hard for over 20 years and still carries on. the big ends and crankpins are slightly worn, it gets hot but still carries on, much like its operator.

Alan

This is much more rigid than the boat toolholder. The base block has a shallow slope enabling the cutting tool height to be adjusted.

Alan

Edited By Alan Jackson on 09/07/2021 17:37:32

MLA version QCTP with no overhang

Alan

If they made the vertical scale more realistic say max 4 degrees then the chart would show a much less steep rise. Just what you can do with manipulated charts and figures.

I entirely agree with SOD and Martin Kyte that the QCTP fitted to a typical small model engineer's lathe suffers from inherant problems, lack of rigidity due to less than perfect fits between the many introduced contact surfaces and increased cantilevered overhang from the support point below. These to reasons alone contribute to more problems than are solved by a QCTP.

Alan

This what I did

Alan

I bet the fuel tank is intact

Vertical misalignment will make a small error, but horizontal misalignment will make much more error simply because the cutting tool moves in a horizontal plane.

He is my grandson's latest creation. When he goes into my shed he likes to invent something, he is five years old and shaping up well as a future model engineer. After he left this creation, I took the liberty to glue it together, hope he approves my input when he sees it, otherwise I'm in big trouble.

Alan