Member postings for Martin Connelly

Sorry JA, clearly wrong. The lathe can be used either way if the chuck will not be unscrewed. So between centres, collets, bolted on chucks and D1 type mounted chucks can be used either way.

See this threading technique where the part is spun in reverse with an inverted tool to cut R/H threads with the tool moving away from the headstock.

Page 17 of the Warco manual strongly recommends removing the idler pulley when using one long belt.

Martin C

If you look at the picture of supplied parts in the Clarke manual there are 4 drive belts. Overly complicated system it seems. I can see why a VFD would be preferable as John has found out.

Martin C

I have had this from BT SMS service calls when someone sends a text to a landline. I think it went away after another one came through and I chose to delete it.

Martin C

Look at page 21 of this Grizzly manual for their version of this machine. It also suggests loosening the idler pulley nut but shows a view of the nut they are referring to.

Grizzly CL4015Z manual

Martin C

Edited By Martin Connelly on 17/03/2023 12:54:30

As with many such questions there is not a simple yes/no answer. On the basis that it is a single taper I would suggest it does not have a minimum, as long as the part being held is sized to suit the collet and can take the pressure of all the closing force on a small area. If you look at ER collets for small diameters they do not support the part all the way along the collet but larger ones do and need something to be gripped nearer the back as well as at the outer lip. Also, don't try large cuts on a part held by very little contact or have a long, unsupported, stick out from the collet. If you use soft jaws for something like a washer it is a very similar work holding method apart from there being a shoulder behind the part that will also resist pressure from things like drilling. With a 5C you can add a back stop to resist pressure from the front.

Martin C

One for the moderators to check

Martin C

Try these people, they may know someone else if they can't help Lowe & Fletcher

Martin C

Edited By Martin Connelly on 14/03/2023 18:42:56

I copied Tommy Walsh's basic design to build my own.

Edited By Martin Connelly on 13/03/2023 08:40:51

It was on Bridge of Lies. You had to decide which one of a number of statements was correct, the others being incorrect. This statement that prompted this thread was "all alloys contain metal".

Martin C

You can also create a post in Word or some other suitable word processor then copy and paste into here like this:

x² x³ x⁴ x⁵

x^-1 x^-2 x^-3 x^-4 x^-5

√()

Or even just copy from this post and paste into your own text

Martin C

Edited By Martin Connelly on 11/03/2023 13:50:44

Here's Joe Pie's video on this subject:

JA look at this thread for my post on 8 Jan 23 Special characters

Martin C

JA m/s² m³

Martin C

Surely the claim that understanding the values 0 to 5 thou is better than the metric equivalent is simply personal preference. As someone who had to work in both units for most of my working life I know that 1mm is about 40 thou (39.37, close enough for estimating which is what people are suggesting here) so 4 thou is about 0.1mm 1 thou is about 0.025mm. I can add 0.1 and 0.025 and combinations of these to get 1, 2, 3, 4, 5 thou, and vice versa, without having to resort to paper and pencil or calculator.

Martin C

SOD you missed off vegetable oils as used in cooking. They are pretty harmless and may need a bit of time to soak through the adhesive but are also usually available and cheap.

Martin C

7/8" is 22.225mm so I would guess 7/8" 12 TPI but would use a thread gauge to check if it is a 60° or 55° angle thread. You may be able to get a good macro picture with a digital camera or phone camera that you can measure with a protractor. There was a recent thread regarding the smaller threaded tooling for Autolock chucks and they use 20 tpi Whitworth (55° ) threads. Recent discussion on endmill threads

Martin C

Edited for unwanted smiley

Edited By Martin Connelly on 01/03/2023 08:44:58

A set of thread gauges would be a useful tool to have. As well as checking what you have now they will come in useful in the future as well. Look for 55° Whitworth form, 60° Unified form and 60° Metric form. If you can get a chuck on to the point where you can do some work consider making a dummy spindle nose in aluminium that you can use to check backplates and faceplates without risking damage to the lathe's spindle nose. A dummy spindle nose is also useful if you want to machine your own backplates or faceplates.

Martin C

Without knowing what equipment you have available to use make suggestions a bit hit and miss, but my go to for this would be to hold the head in some soft jaws that have been turned to suit the part.

Martin C

Ø6 button tools are great for machining plastics where the forces are a lot lower than when machining metal.

Martin C