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Member postings for old mart

Here is a list of all the postings old mart has made in our forums. Click on a thread name to jump to the thread.

04/08/2021 21:51:14

Push the quill up as far as it will go, and examine the top of the spindle to see if there is anything stopping the splines from passing through the drive that the pulleys were on.

This link to a Grizzly manual might help, these drill mills are of very similar design.


04/08/2021 21:36:00

Your photo shows the depth stop still in place, have you removed the adjuster screws? Also, the fine feed for the Zaxis is still in place (2 socket head cap screws), I removed that on a similar mill, although that may be clutching at straws. Removing the pulleys would, as far as I remember, have no affect, as the centre part with the female splines would still be in place.Your spindle is empty, I presume?

Edited By old mart on 04/08/2021 21:37:24

04/08/2021 20:59:54

You didn't mention the depth stop, but it's so obvious that it would be a very long shot. The other thing would be to use a mirror to look down at the top of the front pulley to see the splined end of the spindle which should pass through the centre of the splines in the pulley as the quill is lowered. A captive drawbar would certainly stop that happening.

Thread: New Chuck wont screw on
03/08/2021 20:40:45

Good result, and lucky to be able to get hold of a tap.

03/08/2021 20:36:07

This picture shows the front of the museum's drill mill. If the depth stop mechanism and the plate behind it are removed, access for the preload of the spindle bearings is available. And also a view of the inside of the quill bore in the head. Your machine may be similar and there is a possibility that you might be able to see something causing the jam. Does it stop dead, or just get tighter and tighter?


Thread: self catering v independent
03/08/2021 20:19:05

The main shortcoming of a 4 jaw scroll chuck is that it requires perfect material to hold, and even if the material is perfect, there is always a large chance that all of the the jaws are not always the same distance from the spindle axis. A three jaw scroll always clamps on the workpiece even if not accurately. The 4 jaw independent takes more time and effort but can hold the work in any position you would desire.

03/08/2021 20:05:25

There will be a length of rack gears cut into the side of the quill and if the gears are not cut right to the top of the quill, and the meshing gear is still in place, that would stop the removal.

Thread: Leveling machines
03/08/2021 19:52:52

The only thing that matters is whether the lathe turns metal well enough for your purposes. I doubt whether 5% of lathe owners have ever leveled their lathe.

Thread: Anyone know what this is
01/08/2021 15:50:01

The difference in the surface finish either side of the step, and cutting off part of the laser etched characters makes me suspect it has been modified for a special job. I think they started life as normal end mills. Having both drill and mill characteristics makes them very versatile for home use.

Edited By old mart on 01/08/2021 15:53:08

Thread: Drill powered nibblers - buying advice sought.
01/08/2021 15:39:42

I bought one similar to the Axminster one, I forget the name, the spare parts make it better value. A line of oil should be run along the cut line, or the parts will wear quickly. You can rotate the heads and lock them quickly to make the direction of feed easier.

Thread: New Chuck wont screw on
31/07/2021 21:03:13

A matching pitch thread chaser would be of great service with a slightly tight thread, and excellent for removing that difficult pressed in swarf that defies wire brushes.

Thread: ACME taps and Dies
31/07/2021 19:21:12

I bought one from Tracey tools to finish the X axis nuts for the Tom Senior light vertical. Having tried the tap in a bit of scrap with the correct starting bore, I decided to partially single point the thread on the lathe and finish with the tap. Their ACME taps are very long with a single taper, but I wasn't prepared to risk breaking it in gunmetal. The finished thread had some backlash on the leadscrew, but I had modified the design for two nuts with backlash adjustment, so that didn't matter.

I have seen pictures of extra long ACME taps with two stages of threading, they would produce a thread in one pass without the extremely high torque.

There is some information on exactly what I did in the manual machines, Tom senior threads.




Edited By old mart on 31/07/2021 19:23:07

Edited By old mart on 31/07/2021 19:24:23

Thread: Boxford STS 10-30 lathe manual?
28/07/2021 20:43:39

Probably not what you want, but lathes UK have a printed manual for £45.


Thread: Running needle roller bearings
28/07/2021 20:35:06

As the forces will be minimal and the minimum of friction is best for that type of motor, if possible, the shaft in the bush should be made a very light push fit at first and then polished down with 1200 or finer grit paper used with light oil until it fits with no friction at all. Every stage would need washing in solvent before testing the fit to avoid getting abrasives in the bush.

Thread: Stainless Watch case
28/07/2021 20:14:34

Wonderful precision work. I couldn't see the photo's when I first visited the thread, but now I am logged on, they all work as expected. I have never had that happen on this forum before.

Picture 2 made me chuckle, instead of wearing a 2 inch bar, the anvil would be a good substitute.

Edited By old mart on 28/07/2021 20:22:09

Thread: Hahn & Kolb micrometer
27/07/2021 21:28:04

I looked on the H & K website, but unfortunately there is nothing listed and no sign of any of their legacy tools. If you like, I could post a link on an American website that I am a member of to spread the search wider.

Thread: Help with surface plates in Derby
27/07/2021 21:19:18

You could try lapping them together as they are nearly the same size, using fine compound and light oil. It would be a help if you could post photo's of them.

Thread: Running needle roller bearings
27/07/2021 21:13:49

You could look at sintered bronze bearings, available in metric and imperial, self lubricating and already made to size.

27/07/2021 17:11:33

You may be able to get a thinwall sleeve from a bearing supplier for the needle roller to run on. I fitted one on a motorcycle gearbox shaft to repair it.

Edited By old mart on 27/07/2021 17:12:53

Thread: To paint, or nor to paint.
27/07/2021 14:26:03

I'm with Jason here, a light coating of lacquer. But it would also look great in a suitable regional livery.

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