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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.

Thread: We thought the Aliens had landed
19/07/2021 19:24:46

There's another one west of Gatwick airport in the village of Northchapel in West Sussex. The outgoing aircraft used to switch off their landing lights when passing over the beacon. I believe the morse code was MID, for Midhurst.

Thread: Mechanical Calculators
18/07/2021 16:22:44

There is a section of Bletchley Park which has an interest in old calculators, yours might be of interest to them.

**LINK**

Thread: Chuck fitting
18/07/2021 15:08:55

Space the new holes evenly between the old ones and you will always have the choice of two fixing methods.

Thread: 4 Jaw Chuck Advice Please.
18/07/2021 14:51:01

I bought one of their little 100mm independents, and it is better than the original on my 7 X 12 lathe, it is not in the Pratt Burnerd or Bison league. It is, however, much better value for money.

You might find it comes with only rear mounting near the periphery and being a four jaw, you could easily make it front mounting if required.

Vertex chucks might be within your price range, worth a look.

Edited By old mart on 18/07/2021 14:59:03

Edited By old mart on 18/07/2021 15:00:51

Thread: Getting my Britannia No.13 into use
18/07/2021 14:47:11

If you don't mind offending the purists and there is enough metal to safely retap the holes, then it is entirely up to you. As the lathe is destined to be actually used rather than made pretty and looked at, then improved oiling is a good idea.

Thread: Hi everyone
17/07/2021 19:55:51

Welcome to the forum, Ian. There is a fair bit of info on the lathes UK website:

**LINK**

Thread: Chuck fitting
17/07/2021 19:39:48

If you have the space and really want to use different fixings, there is nothing to prevent you doing so. Look at this backplate being modified to take a smaller chuck. It looks a bit like a swiss cheese, but works perfectly. _igp2653.jpg

Thread: Getting my Britannia No.13 into use
16/07/2021 19:48:18

Hi Tony, welcome to the forum, it looks like you will be having fun just getting the lathe running, metric threads can take a back seat.

Thread: Autolock stuck drawbar won't screw in
16/07/2021 17:22:53

Looking at the gap in the photo, and knowing that the ring can be screwed up and down, I would try a pair of motorcycle tyre levers. A block of wood placed underneath to limit the sudden movement to about 1/2" when the taper breaks would prevent any damage. The thread seems like being a choice of 10mm and 3/8 Whitworth. Tom Senior mills with MT2 definitely used 3/8W.

15/07/2021 18:41:25

You will be able to get a 12" (300mm) length of 3/8 Whitworth studding on ebay which is just under 10mm so the 8mm you tried wouldn't screw in. You might have been able to break the MT2 taper with the 8mm just by hitting the projecting end with a hammer. The thread on that collar with the tommybar hole in it is left hand.

Edited By old mart on 15/07/2021 18:43:10

Edited By old mart on 15/07/2021 18:44:24

Thread: Shock at low pay for high skill
11/07/2021 17:45:57

15 years ago I was taking home just over £300 for 50 hours skilled fitting in aircraft parts and subassemblies. £25 an hour seems a huge ammount to me.

Thread: Bearing Location - Pulley or mounting block
11/07/2021 17:41:49

You are lucky to have a choice, both ways would be usable, but I would tend to lean in towards having the bearing/s in the pulley for slightly better rigidity.

Thread: Upvc front door
11/07/2021 17:37:55

My door mechanism failed about 5 years ago and I got a replacement one, about 5 feet long of the same style from a local door specialist for about £70. I did not think about ebay at the time as I was in a hurry to get it working.

Thread: Power feeds for Chinese mills
11/07/2021 14:01:36

The unit that William Chitham has looks like one of the ebay type which sell for under £140. I have been thinking about getting one, they use 230V which might be of concern. I would like to hear about how easy they function and whether the stops allow you to repeatedly cut up to a shoulder. There are two types, similar in price, but one is 135lbin and the other is 450lbin.

Thread: Spare jaws wanted for 3 jaw chuck
09/07/2021 21:42:05

Rotagrip sell CC16 soft jaws which should fit the K11 series. Their website has dimensions for the soft jaws.

**LINK**

Thread: Beginers telescope
09/07/2021 21:29:37

This is the sort of telescope that is great for beginners, a little more expensive than I thought, but I'm very out of date:

**LINK**

Thread: Insert Tip radius?
09/07/2021 14:58:24

I have some 0.1, they have only been or use for drag engraving, but having a selection from 0.2 to 0.8 comes in handy.

Thread: Tool post height
09/07/2021 14:50:55

For those who would like TNMG inserts, but don't have a big enough lathe to take the common size 16, (there are smaller, but they are like hens teeth), you can look at WNMG 06 which has all the advantages but is smaller.

Thread: Imaging the very small
08/07/2021 20:29:30

Much more compact than an electron microscope, but probably out of my price range. crying

Thread: Beginers telescope
08/07/2021 20:24:30

I would go for one of the smaller motorised models with the computerised drive. It will make viewing so much easier and they are not that expensive.

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