Here is a list of all the postings Brian Oldford has made in our forums. Click on a thread name to jump to the thread.
|Thread: 63-tooth change wheel for Portass PD5|
I know that a Portass lathe has imperial gears. I was simply reporting what that particular web site said.
For comparison Myford change gears are 20DP. According to **LINK** there's only a 75% confidence of it being 12 DP. whereas it's 94% for Mod 1.5.
Edited By Brian Oldford on 04/07/2020 20:08:49
Assuming it's an imperial gear, do you know the DP? Myford change-wheels are usually CI.
Edited By Brian Oldford on 04/07/2020 18:09:12
|Thread: Part breakout /fixturing|
Use the third axis to leave a few small tabs to hold the piece in place.
|Thread: Neil Hemingway Kits|
I would suggest manufacturing cost which would need to be passed on to the purchaser.
|Thread: Tungsten carbide for shapers|
How can that be achieved when putting a key-way down a bore? I realise industry would use a broach nowadays but that's might spendy for a one-off.
|Thread: Electronic Lead Screw Project|
As you may notice I have a few more things to do before I get to try this arrangement to work.
1: I have the key-way to cut.
2: Arrange to secure the bevel-gear to the lead-screw. (The grub-screw holes are there to secure the original bevel gear to the sleeve that fits around the lead-screw.)
3. Insert the remaining two screws that fix the stepper motor to the angle bracket.
After being diverted onto other tasks (some from SWMBO and others such as collecting an alternative mill) and having a long ponder on the problem of stepper motors not taking too kindly to the end thrust from skew gears and following the advice of others I decided to replace the previous arrangement with 2:1 Bevel Gears.That in itself proved to be a bit of a task because the larger bevel gear being attached to the lead-screw required modification to fit and to be able to drive.
|Thread: Model Engineer Beam Engine - 9/16 Brass Ball Bearings|
Try here **LINK**
|Thread: Weeds in a 'lawn'|
Get a couple of Labrador bitches. Their continual piddling will kill off most plants PDQ.
|Thread: Perfecto 5” hand shaper|
Looking at those lovely swan-neck tools got me thinking.
Wouldn't it be possible to make a tool that relieves the cut if the bend of the swan-neck moved the cutting edge further back?
|Thread: Jacobs morse taper chuck.|
+1 for folding wedges.
|Thread: Hermes Parcels|
This morning Hermes notified me they had reimbursed my Paypal account for an item they managed to break whilst in their "care". Thankfully I had paid the additional amount to insure it fully.
|Thread: Does it matter if tender valves pass a slight leak?|
Firemen on heritage railways usually get an ear-bashing from the inspector for wasting water if they do that.
|Thread: Mild Steel Rod in Metric Sizes|
Lots of sellers on that well known auction site.
|Thread: Electronic Lead Screw Project|
Many thanks Phil. I do like the control panel. £?
|Thread: Brush motor repair|
That what I use as my shop vac. Great for getting the swarf from the nooks and cranies.
|Thread: What Did You Do Today 2020|
Whilst waiting for parts to arrive for my Clough42 ELS I made the housings and fitted lead-screw thrust bearings.
As the new arrangement is somewhat longer I've had to "steal" back some space by: -
Edited By Brian Oldford on 11/06/2020 20:26:47
|Thread: Just right for the holidays.|
I shall defer purchase until August.
|Thread: Cutting Oil|
Isn't that the reason why some people are migrating to mist coolant/lubricant?
The inexpensive compressors that are now readily available make such a proposition quite viable.
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