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Member postings for Mick B1

Here is a list of all the postings Mick B1 has made in our forums. Click on a thread name to jump to the thread.

Thread: Can they be serious?
09/09/2017 09:48:26
Posted by Hopper on 09/09/2017 09:43:57:

Sometimes when they go out of stock they put on a silly high price just to hold the advert slot so they don't have to set it up from scratch all over again when new stock arrives. Instead they just put the real price in and away you go. RDG do it a lot too.

Aha! thank you! :D

09/09/2017 09:43:24

I've seen this a lot - crazy Bay prices in engineering tools that nobody would pay. I've often wondered what the intention is - there are too many to be accidental. For example, you can get an Everite Knob from Myford Ltd. for £998.95.

Edited By Mick B1 on 09/09/2017 09:43:49

Thread: bearings binding
09/09/2017 09:38:07

I'd guess the main purpose of making it a sliding fit is to provide 'feel' for the preload, without the additional drag of forcing the inner race along the spindle?

08/09/2017 07:12:18

You gotta suspect misalignment. IME the most usual cause is a particle at the bottom of the outer race seating bore, causing a thou or so tilt in said race.

Of course that's only a guess.

Thread: MEW 259 - parting off
07/09/2017 11:07:32

If it's a small component I'm parting off, I just catch it a little old yeast tin I keep on the lathe for the purpose.

Thread: Trade description
06/09/2017 17:29:54

None of you got your calculators out,then?

31/64"'s actually only 0,003125mm oversize.

06/09/2017 16:40:26

Well, I was gonna say summat, but on second thoughts I don't think I'll bother... :D

Thread: SRDCN Profile tool
04/09/2017 17:49:19

Another possibility - carefully grind a few thou off the tip of the key to remove the rounded edges and expose sharp corners.

Sometimes it works.

Thread: Boring large diameter hole in aluminium bar
04/09/2017 09:01:21

An HSS boring bit will work fine if you get the rake right, keep it sharp, and polish the top and tip radius with a slipstone to stop it picking up.

Thread: Looking for 3/32" SQUARE silver steel
01/09/2017 08:48:46
Posted by RichardN on 01/09/2017 08:27:05:

I'm so glad others get lost as to what composition different steels are!

Yes - I have to say I think there's a fair amount of kidology in it. In the tooling department I worked in, we generally got by with only about 6 steel types for everything from jigs and fixtures through compound and progression press tools to injection moulds:-

220M07 (BDMS)

210M15 (Case hardening steel)

BS1407 (Gauge Plate/Silver Steel)

BO1 (NSOH)

BD3 (Abrasion resistant - punches/dies)

HSS (for cutting tools) - yes, there are various flavours of this, but not enough difference between them to make selection critical for most applications. I think we mainly used what's now known as M42.

01/09/2017 07:54:47
Posted by Dinosaur Engineer on 31/08/2017 21:09:36:

ground flat stock is a more refined steel than silver steel. G.F.S. has the additions of elements such as vanadium ...

Looks as if things have changed - back around 1980 when I worked in a tool design office, gauge plate and silver steel were both carbon steels to BS1407, and we didn't distinguish between them in detail drawings.

Now I see GFS uses O1 tool steel. Is this the same as the NSOH steel that used to be called BO1?

Thread: Is 3/32" round tool steel now unobtainable?
31/08/2017 17:33:04
Posted by Andrew Tinsley on 31/08/2017 16:19:30:

Hello Gentlemen,

I should have been more specific. I was really after HSS. Nigel B seems to have hit the jackpot with the Cromwell drill blanks. These are said to be HSS. But as they are described as drill blanks, I am not 100 % certain. One way to find out for sure I suppose!

Thanks everyone!

Andrew.

If they're hardened and ground all over without back taper, there doesn't seem much room for doubt.

Thread: Hydraulic Valve seat
30/08/2017 21:24:23

Well, the original was obviously fracture-prone. I'd try silver steel BS1407, untreated for a first go - then think about hardening it if the first one wears rapidly.

Thread: 65 but dare not retire
30/08/2017 17:49:34
Posted by SillyOldDuffer on 30/08/2017 11:43:10:

Can anyone explain why Imperial Measure retains a following whilst Imperial Money is unloved? They both have the same advantages and, arguably, money was more logical.

Dave

Well, it's not difficult to have as many unit of measure systems as you like running in parallel with the conversion factors permanently fixed. The people who use the less 'official' system can choose to do so without inconveniencing anybody else.

Now imagine running parallel currencies... :D

Thread: Something exciting on its way...
30/08/2017 16:54:13
Posted by mechman48 on 30/08/2017 16:46:38:

Must have come from Oz... it's upside down on Jason's pic... face 20

George.

Ah. I thought he was just joking about Yodel's compliance with the packaging instructions...

Thread: 65 but dare not retire
29/08/2017 19:13:40

I wasn't subscribing to ME in the 70s, but I think you'd've had to write a hardcopy letter and post it by snailmail back then... :D

Mars bars aren't 2 1/2p any more.

Thread: Beam engine piston ?
29/08/2017 10:45:12

Nylon 66 has a max service temperature of 180 C for short periods, 95 and 80 for 5000 and 20000 hours continuous respectively. I'd guess it *might* be just OK.

Delrin maxes out about 82 C, so I'd think not.

Whereas PTFE is OK up to just over 200 C, so it's clearly better if you can get it.

Why not brass with a greased string packing ring?

Thread: New Moore & Wright any good?
28/08/2017 18:47:01
I've had one of the budget line metal M&W digital calipers for about 2 years and it's fine. The view of it given in MEW a couple of months back matches my experience.
28/08/2017 18:46:59
I've had one of the budget line metal M&W digital calipers for about 2 years and it's fine. The view of it given in MEW a couple of months back matches my experience.
28/08/2017 18:46:57
I've had one of the budget line metal M&W digital calipers for about 2 years and it's fine. The view of it given in MEW a couple of months back matches my experience.
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