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Member postings for RichardS

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

Thread: Boxford C - removing headstock
15/05/2020 19:42:22
Just to a little to Pete Rimmers comment.

You will probably need to shorten a spanner to loosen/tighten the clamp bolt at the RHS of the headstock.

Before you refit the headstock, clean the bedways where it normally sits, clean the mating faces of the headstock, lubricate both with slideway oil and wipe off the excess.

Before you tighten the the clamp bolts check for changewheel alignment.
Thread: Alum as metal remover.
07/01/2019 14:11:13
A rummage in my bookmarks leads here:

https://www.trustleaf.co.uk/aluminium-sulphate---iron-free-503-p.asp

Aluminium Sulphate 17% AL2O3 Iron Free

Tge concentration I used: 2 table spoons (30 ml) in a 720gm Branston Pickle jar ('cos it's "pickling").

Remember to keep it warm.
19/12/2018 09:19:41
1. Yes it works on HSS
2. Keep it warm (think coffee cup heater)
3. Replenish with water each day to make up for evaporation
4. Have the opening at the top
5. At 8BA you will need to initially encourage circulation in the hole (syringe?)
6. Clear debris from hole daily
7. Use a glass jar so you can see the bubble stream.

You should get a fine stream of bubbles rising from the hole (might be very fine or intermittant at 8BA). When that slows clear the debris. If clearing the debris does not result in a stream of bubbles after a couple of hours then replace the solution. If replacing the solution does not result in a stream of bubbles then it is probably done.
Thread: Backlash Allowances for Gears
13/09/2018 12:40:26
On a Boxford the tumbler gears can be 14 1/2 or 20 deg PA and the changewheel train is 14 1/2 deg PA. The tumbler gears drive the stud gear spindle and thus never come into mesh with the changewheel chain.

Edited By RichardS on 13/09/2018 12:41:00

Thread: Injector Testing Valve
23/08/2018 11:39:32
Probably get myself banned from the forum for this.

Engineering in Miniature
December 2011
Page 195
All you need to know about Miniature Ejectors and Injectors
Bob Bramson

There is a diagram of the principle of the Bill Carter "quasi check valve" but no constructional detail.

I think Bob Bramson wrote a book on the subject.
Thread: Dimensions for Ball bearing Valves
10/08/2018 12:07:45
On the probably mistaken guess you mean a simple ball type check valve, does this help?

http://ibls.org/mediawiki/index.php?title=Design,_Care_and_Feeding_of_Check_Valves
Thread: Boxford CBS screw cutting charts
17/05/2018 14:21:43
Try this thread

http://www.model-engineer.co.uk/forums/postings.asp?th=124071

Posting by Robbo at 19/01/2017 23:24:07

Titled: Boxford Model B&C Lathes

Also can be found in the Boxford "know your lathe" book.

Richard
17/05/2018 12:52:24
Hi Stephen

Do you mean a Boxford CSB? If so then the necessary info is available in the Files section of the Boxford Lathe Yahoo group (you will need to join the group and yes, I know the user interface is very poor). However, you say there is no screw-cutting on the lathe. Does it have a leadscrew? If not then what you have is a training lathe and adding screw-cutting means finding, at minimum, a leadscrew with bearings, quadrant, an apron, tumbler set and changewheels.

This website will help with identification http://www.lathes.co.uk/boxford/

Richard
Thread: How to remove a chuck from a Boxford model A
01/05/2018 12:36:55
Ian

My guess is that if 3 out of 4 jaw screws are broken then you are down to unbolting the chuck. From there then WD40/paraffin/3-in-one on the end of the thread might loosen the backplate. Alternatively remove headstock from lathe and stand nose down in a tray of diesel. Last ditch, machine the backplate off.

To remove the headstock.
Remove the right hand layshaft bearing holder, this allows you to get the belt off the layshaft.
Remove the changegear cover.
Remove the banjo.
Release the two headstock clamp bolts that are under the headstock between the ways. The front one will need a _short_ (4" long) spanner.

If the belt is currently tight then the belt tensioner is incorrectly setup.
You will probably need to take the belt off the layshaft to fix. The mechanism is basically a pin in a spiral groove and the tensioner quick release lever should be pointing straight down when tight. The quick release lever passes through a threaded bush in the front of the bed support that sets the tension.

More info about the belt tension mechanism can be found in the boxford parts list pdf in the file section of the Boxford Lathe group on Yahoo groups.

Hope that helps.
Thread: Identifying change wheels
04/12/2017 20:21:37
The ones with a 5/8" bore are used on the banjo and are missing their running bushes.
Thread: halloween
31/10/2016 18:45:09
A couple of garden irrigation sprinklers, solenoid control valve set to 10 seconds "ON" time, connect to the doorbell.

Magic.

Especially with a "No Trick or Treat" notice on the door.
They push the doorbell _then_ read notice while they get wet.

Double magic.
Thread: UK Boiler regulations
15/09/2016 11:40:56
John

Do these links answer your questions.

http://www.sevenandaquarter.org/about-us/?/boiler-testing/73
http://www.sevenandaquarter.org/media/documents/boilertestcode2012v12a.pdf
Thread: Old Boxford Lathe
14/08/2016 16:52:52
Model C from 1950/51/52 (confused numbering during that period).

More information available on the Boxford Lathe group on Yahoo,
e.g. Parts list, manual, images of things like the missing speed
setting plate on the headstock.

If your "faceplate" has one open ended slot then it is probably a catch plate
for driving work between centres. The face plate has 6 or 8 closed end slots.

Regarding the grease points. If "lubricated for life" bearings were fitted then yes, no grease would be needed, however if there are broken remains in the holes then they need to be extracted and new grease points fitted.

Be wary of using the belt tensioner as a clutch (we all do it) as the belt can occaisionally catch and spin the chuck just when you don't expect it (guess how I know .
Thread: Does anyone hire out a portable track
11/05/2016 10:45:46
Needed to amswer the same question a couple of years ago. Try here for a start:
http://www.miniaturerailwayworld.co.uk/PortableMiniatureRailways.html

Can not make a recommendation as it did not happen in the end.

Do bear the comments made by Bazyle in mind.
Thread: Boxford CUD change gears, feed speeds and levelling.
31/12/2015 15:15:48

The 46T changewheel is only used for 11 1/2, 23, 46, 92, ..

The Boxford, Smart Brown, Hercus are all copies of the South Bend see the write up on http://www.lathes.co.uk/boxford/

Bookmark the above URL on the inside of your eyelids.

Don't worry too much about what gears came as standard, more important is that you have the gears to cut the threads you need.

> should the gears have a washer between them and the nut?

On my lathe there is a washer (well more of a short spacer) on the stud, ensures the nut does not come in contact with the gear on the idler. For the end of the leadscrew many use a spare changewheel as a spacer. The idler/compounds have a washer.

The only duplicate changewheel needed is 32T, and then only for 8TPI.

On a Mk I you can not close the changewheel cover with a 100T on the leadscrew.

30/12/2015 13:17:42
Ian

The keyed changewheels go on as either stud or screw gears.
The compounds and the 80 idler go on the banjo.

The "standard set" of change wheels appears to have been:
	16, 24, 36, 40, 44, 46, 48, 52, 54, 56, 60, 80,
	72/18 (4:1) compound,
	80 idler (with boss).

so you have some to swap/sell for other potentially more useful ones.

You have a 54/18 (3:1) so you can get down to about 0.002"/rev (480 TPI) with the chain:

16 - 54/18 - 72/18 - 80. It does all fit on the upper arm of the banjo.

If you need to cut metric threads then a 100/127 compound is the best solution. However those are hard to come by and often expensive when found.

Come and join the Boxford Lathe group on Yahoo if only for the useful info in the files and photos.

Thread: boxford parts on southbend
28/04/2015 09:43:03

> been told bits for boxfords will fit straight on apart from backing plate as boxford is whit and southbend is unc.

Correct. Very early Boxfords (1st year IIRC) had a UNC type thread.

> and is it only certain models of boxford that will fit?

Again correct. Model A/B/C/T 4 1/2" with the exception of the nose thread.

> do parts from other lathes fit?

Hercus comes to mind. This is a good place to look http://www.lathes.co.uk/boxford/

Also consider joining the Boxford lathe group on Yahoo, we don't bite, really. OK, the website is poor (OK, an absolute disaster) but use it as a mail list and only use the website for the pretty bits.

Thread: Gear ratios and alternatives
09/03/2015 19:10:41

If I have picked up the right chain you need:

75/50 and 80/60 and are missing the 75.

75/50 is 1.5:1 so a 60/40 will give the right ratio.

The iffy bit is if the gears will mesh.

Thread: Have you ever considered getting a 3D printer?
17/02/2015 19:52:27

No, no, no.

Neil needs a 3D printer to make a robot to walk the dogs. A bit like "The Wrong Trousers", or then again, maybe not.

Richard

Thread: Help with South Bend lathe please...
11/02/2015 20:53:03

The word you are looking for is "compound", e..g 72/18, 54/18, ...

There is more on Tony Griffiths site http://www.lathes.co.uk/ than you wish to know (if you have not already found it).

There is a South Bend group on Yahoo but you are welcome to join the Boxford group as well, we don't bite (much) and the lathes have much in common.

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