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Member postings for Thor

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

Thread: Center drills
09/04/2020 10:31:38

Hi Jeremy,

Know Your Lathe from Boxford has a table showing Centre Holes for 5 to 100mm dia shafts:

centredrilltoworkdia.jpg

Thor

Edited By Thor on 09/04/2020 10:32:36

Thread: Homemade Lathe Tools
06/04/2020 14:18:40

Hi Jeremy,

dieholder_103a.jpg

A tailstock dieholder is very handy when threading small diameter rods.

Thor

Thread: Guidelines for which steel to use for projects
02/04/2020 05:44:09

Hi Jeremy,

If you run your model engines often and the engines have to work hard you might want to use a harder steel like silver steel, EN8 or EN16 for things like crankshafts. For parts you want to weld, use mild steel. Check out M-Machine's Material Specification and Comparison. For a steam engine you may want to use materials that are less prone to corrosion like brass or gunmetal instead of cast iron, and stainless steel for the piston rod.

Thor

Edited By Thor on 02/04/2020 05:49:26

Thread: non-circular boring.. Literally - it is boring!
31/03/2020 06:09:27

Impressive Sam, now you should be able to make your own socket head cap screws.

Thor

Thread: Coversion charts
29/03/2020 15:38:13

***Link*** to a PDF version of Steve's chart.

Thor

29/03/2020 11:56:17

Hi Steve,

I have sent you a PM.

Thor

29/03/2020 07:48:49

Hi Steve,

Good idea, to get sharper JPG's you could upload your large JPG's to Dropbox (or something similar) and just post links to the larger JPG's. As you say the JPG's shown here isn't very sharp.

Thor

Thread: What are you doing to stay safe
27/03/2020 05:11:24

Following the advice from our government, washing my hands, cleaning objects that might get infected and trying to keep at least 1m away from others when I'm out shopping.

Thor

Thread: Fixing motor for Myford Ml7
24/03/2020 10:06:46

Hi James,

According to this, a 5A fuse might be too small for a 0.5HP motor. Does the motor get hot with the present fuse?

Thor

Thread: Does Silver Steel normally look like this?
19/03/2020 11:13:10
Posted by Chris TickTock on 19/03/2020 11:00:22:

Just had it confirmed they are silver steel and apparently old Stubbs Stock...whatever that means.

Chris

Edited By Chris TickTock on 19/03/2020 11:00:38

 

Stubs used to make silver steel, seems the trademark is now owned by this company, more background info here.

Thor

Edited By Thor on 19/03/2020 11:14:52

Thread: Ml10 imperial threadcutting
15/03/2020 05:50:03

Hi Jeremy,

I assume you have the manual for the ML10; there is a table of the pitches you can cut. With the right changewheels you should be able to cut most of the imperial threads a model engineer would need.

Thor

Thread: Indexable Carbide Turning tools
14/03/2020 16:52:46

Hi Garry,

The inserts I use has a nose radius of 0.4mm that I find work well for my small lathe where I use a small cutting depth. A larger nose radius will give a stronger edge and can be used for a larger depth of cut. Sandvik has some explanations here.

Thor

Thread: Problems with Groups IO?
14/03/2020 15:57:21

Hi Brian,

I just checked the Boxford group, the last message I can see is from the end of Feb.as you say.The EmcoV10 group has messages from today.

Thor

Edited By Thor on 14/03/2020 15:59:02

Thread: Way oil vs Chain bar oil vs motor oil
13/03/2020 18:25:55
Posted by Bo'sun on 13/03/2020 16:15:01:

I can understand why chainsaw bar oil might be considered, as it contains "anti-fling" additives, presumably similar to the "tackifier" additives in way oil. Without making a direct viscosity comparison, I'm guessing, that chainsaw bar oil is more viscous, because it needs some of it to cling to a chain travelling up to 30m/s. It also needs to be able to operate at high temperature. Anyone tried mixing bar oil and a straight low viscosity mineral oil?

When I used mineral based chainsaw oil I tended to blend it with some ISO 68 mineral oil (may be not be low viscosity) because, as you say, chainsaw oil tends to be a bit more viscous. The chainsaw oil worked fairly well on the vertical slides on the milling machine.

Thor

13/03/2020 09:44:07

I too have used mineral based chainsaw oil for my milling machine and lathe ways, thinking that some lubrication is better than no lubrication. I have also used car engine oil, both have worked, but when a friend gave me 5L of proper way oil I said thank you very much. I too experienced smoother movement of the slides and the price was of course, excellent. I now use the mineral based chainsaw oil on the lathe change gears.

Thor

 

Edited By Thor on 13/03/2020 09:45:03

Thread: Complicated post
06/03/2020 05:43:33

Hi Steve,

Measuring how much room you have for your milling machine is good advice. I would recommend a milling machine with a square section dovetail column. My milling machine has a MT 3 spindle which means I can use the same tooling in both my small lathe and the milling machine, R8 might be a better choice if your lathe doesn't have a MT3 spindle. A gear head machine will have more torque at low RPM's so if you intend to use flycutters or large facemills a gear head might be an advantage. If you go for one with electronic speed control, a brushless DC motor will have more torque at low RPM's than a brushed DC motor. On my new lathe I have a 3 phase motor and VFD and the possibility to change the drive belts to give low speeds and high torque or a more direct drive at high speed. I'm very satisfied with the 3 pjase VFD combination.

Thor

Thread: Mini-lathe speed reducer
01/03/2020 04:46:53

There is an article by Neil here, another one here.

Thor

Edited By Thor on 01/03/2020 04:54:04

Thread: Flux
28/02/2020 04:40:20

I too use the HT5 type flux for all my brazing, and as Brian says, the flux residues may take be a bit more difficult to remove and need a longer pickle time.

Thor

Thread: Tooling and Feedscrew Clutch
20/02/2020 05:32:21

Hi Jeremy,

The ML10 leadscrew clutch is demonstrated in this video:

You can get a manual for the ML10 here.

Thor

 

Edited By Thor on 20/02/2020 05:33:01

Thread: Boxford Lathe BUD Manual
19/02/2020 04:29:13

You can download a Mk.2 parts list here, and you can find Boxford's "Know your lathe" here.

Thor

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