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Member postings for Clive Brown 1

Here is a list of all the postings Clive Brown 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: four way toolpost with ratchet
28/01/2022 08:52:32
Posted by Neil Wyatt on 27/01/2022 22:02:26:

I don't think it's Myford, I don't recognise it all.

The ratchet pawl is integral to the toolpost - you can see a plunger in the second picture. The first picture shows a grub screw that probably conceals the spring behind the plunger.

I'd guess the nut and bolt are just keeping it together and in use it would fit to a toolpost with a hexagonal flange to engage the three pins in the ratchet.

Neil

It is a Myford. As said, the nut & bolt are just holding things together. The 3 "pins" are actually c'sk screws which are used to attach the ratchet to the top-slide. The handle, which is missing, screws onto the tool-post and clamps the tool-holder down. My example, which I can fit to my Boxford, is marked on one edge with the Myford logo and part no.

Thread: Minnie 1"
28/01/2022 08:36:39

I don't think that there's a hard and fast rule. On the sizes you're quoting then, say, 1/4 to 1/2 a thou" would be OK. I wouldn't use an MT insert for this work, but not much to choose between a GT insert and HSS .

A very fine flat file can be useful for final sizing, (Cries of horror from the experts! ). These files don't seem easily found these days. Try to make a short  lead-in and a  veryslight taper on the mandrel to start the workpiece pushing on.

Edited By Clive Brown 1 on 28/01/2022 08:42:40

Thread: Unknown tool
26/01/2022 16:22:59

It's a fairly standard needle file for filing the base of a narrow slot. Many other shapes are available. Bedford is the maker's trade-name. The 4 will be the "cut", fairly smooth.

Edited By Clive Brown 1 on 26/01/2022 16:23:43

Thread: Smart TV
25/01/2022 10:56:41
Posted by Michael Gilligan on 25/01/2022 10:32:46:
Posted by JasonB on 25/01/2022 10:27:33:

Scart adaptor

.

It’s worth reading the reviews of that item

… it may, or may not, be what Bob needs !

MichaelG.

The item in the link looks as if it could be a mini HDMI connector, but it's not made clear.

Thread: A Lightweight Husky
23/01/2022 10:28:31

Thanks for moving the video Jason. It's not fixed but it does start to wander around the bench if I tun the pressure up.

23/01/2022 09:59:13

I've not built a uniflow engine up until now so here's my take on Husky, inspired by this thread. Not as elegant as JasonB's but it runs.

Basic dimensions are pretty much to the magazine plans. I've slightly increased the cylinder clearance volume at TDC to reduce compression. The valve travel is slightly longer in an attempt to lessen leakage into the cylinder when the inlet port is closed, also the flywheel is heavier.

(This post is also a first try at embedding video)

https://youtu.be/gZmFcMgk7eY

Edit:- was hoping the video would open automatically, however, the link seems selectable and clickable but not ideal.

 

 

Edited By Clive Brown 1 on 23/01/2022 10:07:22

Edited By JasonB on 23/01/2022 10:22:23

Thread: Lathe change gears vs gearbox
22/01/2022 21:25:32

That sounds like a well equipped machine.

Re change gears, do you have the gear train between the spindle and the gearbox? For an imperial "A" machine this should be four gears thus:- 20t; 80t idler; 56t and with a 40t, normally mounted as a spacer, to replace the 20t for the coarsest pitches, ie 4 to 7 tpi.

There is normally no need for other gears unless you require metric piches..

Edited By Clive Brown 1 on 22/01/2022 21:28:22

Thread: 5" Gauge Loco Project
21/01/2022 21:52:13

Caution is needed in purchasing a part built project. You could also be purchasing a lot of errors and poor workmanship. Any such venture needs care and as much knowledge as possible of th project's pedigree.

Be particularly careful if a boiler is involved.

That aside however, it could be a very acceptable time and cost saver if many of the necessary castings are included.

 

Edited By Clive Brown 1 on 21/01/2022 21:53:07

Thread: Lathe identity
18/01/2022 16:59:47

The Lathes.uk site says that Loughborough feed-screws are square-thread, not the more common acme form used for the Little John machines. Could this also apply to the chuck mounting thread?

Thread: 5" Gauge Loco Project
16/01/2022 20:05:52

Simplex has been the choice of first loco. for many people, me included over 30 years ago.. It's a good model, straightfrward with not too many fiddley bits, decent looking and a good runner on the track. There are one or two drawing errors, or were!, but nothing too disastrous. The construction manual might be available if you look.

Be prepared to put in 1000+ hours.

There's also Super Simplex, of which I know little.

The website "Model Engineering Clearing House" has a Simplex section.

Just looked at MECH webpage, it doesn't seem very active of late.

Edited By Clive Brown 1 on 16/01/2022 20:12:07

Thread: Steam raising blower
10/01/2022 09:27:36

I found blowers hard to source so I made one.

The rotor is 2 brass discs with 8 radial blades, o/a diameter is 2.5", all silver soldered. There's no real need for a volute. The rotor shaft spins on small ball bearings. At the high speed that it rotates I .found balance fairly important. The motor is 12v. All items were either from the scrap box or Ebay.

Raises steam OK on my Allchin and Simplex.

p1020939b.jpg

Edited By Clive Brown 1 on 10/01/2022 09:28:10

Thread: Springs for 5 inch bogie
08/01/2022 21:34:07

Reeves 2000 stock a range of springs that can be used for locomotive suspensions.

Thread: UK source for 17/32" ring spanner ?
04/01/2022 15:09:41

1/4" Whitworth or 5/16" BSF spanner size is nominally 13.3 mm AF. Could it be that? If so then should be available.

Thread: Slot cutting
03/01/2022 19:30:43

Drilling and sawing across would be easier, quicker, cheaper and more accurate.

Other than the above there's nothing to choose between the methods!!

Thread: Gas fired Allchin
02/01/2022 11:59:25

Interesting proposition. For gas firing, a boiler requires more heat transfer surface area than for coal equivalent as the radiant energy of a gas flame is lower. If you've built to the Hughes' boiler design, you might find that the steaming of the boiler is below par.

I wonder if filling the firebox with ceramic "coal" might help. Just a thought, I've no experience of that.

Thread: Ba bolts
30/12/2021 12:10:12

EKP is at Barnstaple ??

Thread: Myford Lathe Service
29/12/2021 16:22:01

For the remote pot.

00-05 = 2.

Pot goes across 10v and AGND with the wiper to AVI.

 

Edited By Clive Brown 1 on 29/12/2021 16:22:34

29/12/2021 09:15:21

This is one of the diagrams I used for the remote panel for my Teco510 a while back. All components from Inverter Drive Supermarket. They seem to have now removed this particular pdf.

Pencil refers to my own wiring colours.

img_20211229_0001.jpg

28/12/2021 21:39:00

Err 1 indicates keypad operation error. The instruction say that parameters 00-05 & 00-06 must be set to 0 to enable the keypad as frequency source

.Also 13-06 locks the keypad if not 0.

Have you checked these?

However, I would have expected the factory reset to have set these values.

Thread: Minnie 1"
23/12/2021 14:41:26

I'd suspect that the tool is rubbing and not cutting well. What type of carbide tip are you using and is it in "as new" condition? It needs to be the ground and polished type suitable for aluminium, non-ferrous etc.

A really well sharpened HSS tool might do better.

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