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Member postings for John C

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

Thread: Brown and Sharpe 252 Adjustment
11/10/2017 16:00:16

OK, Clive, I'll give that a try. Thanks again!

John

11/10/2017 09:54:51

Thanks again Clive. Having reassembled the thing, it now reads almost spot on at the thimble but 0.5mm high on the rod! The thread is 0.5mm pitch which may have a bearing on this, but I have yet to see how, apart from a huge coincidence.

More thinking required.......

10/10/2017 17:48:31

Hmmmmm, curiouser and curiouser......

img_0724.jpg

The thread inside the graduated thimble engages with the thread in the body with the fixed anvil. So their relationship is fixed. There appears no way to turn the lubber line relative to the thread in the body. The rod that moves within the body is driven by the shoulder against the inside of the graduated thimble - again this relationship is fixed. The hole at the end of the thimble is a sliding fit on the narrow portion of the graduated rod. The threaded washer and dome nut merely adjust the backlash. So unless I am missing the blindingly obvious, I can see no way of setting the mic except altering the position of the moving anvil on the rod - which seems a bit crude!

Any further suggestions gratefully received.

John

10/10/2017 13:18:15

It's a fixed thimble, Clive. I shall have a go at removing the screw. Many thanks for your input,

John

10/10/2017 10:05:00

I have acquired a Brown and Sharpe 252 internal micrometer. This is a very nice item, very smooth and in good condition. However, I can see no way of adjusting or calibrating the device. There is no hole for a c spanner to rotate the lubber line, as on similar micrometers. There is what appears to be a stamped figure Z or 2 adjacent to the fixed anvil, and a screw with collar on the end of the barrel. The moving anvil is a good fit on its shaft, secured with a grub screw, but with no obvious sensitive adjustment.

Does anyone have experience of this model that can point me in the right direction to correctly zero the reading?

 

img_0722.jpg

 

img_0723.jpg

Many thanks,

John

Edited By John C on 10/10/2017 10:06:05

Thread: Alfred Herbert Surface Grinder
18/09/2017 20:29:13

The wheels are on an arbour which is secured by a nut with a LEFT hand thread - a C spanner will undo the holding nut. I don't have arbours for each wheel, so I have to dress the wheel after each change. I have found that there are two hole diameters for wheels: 1 1/4 or 32 mm......different enough to make a difference. My arbour is 1 1/4.

John

Edited By John C on 18/09/2017 20:29:50

Thread: Trade description
06/09/2017 16:38:45

Did you check it though, Vic - with a steel rule AND a magnifying glass........

Thread: Vice for Thin Stock
31/08/2017 18:52:23

Blimey Rod, that was quick!! I shall go and try to find it.

Thanks again,

John

Edited to add - found, I doubt if I would have stumbled across it with random searches.

Many thanks Rod,

John

Edited By John C on 31/08/2017 18:55:34

31/08/2017 18:42:36

img_0704.jpgI am certain that I have seen, in one of the many M.E. books, plans for a device to hold thin stock very similar to the one shown in the photos. However, a search of my bookshelves has proved fruitless. Does anyone remember where such a device was described?

img_0703.jpg

Many thanks,

John

Thread: 12 Speed Bench Drill
25/07/2017 05:42:53

Hi Alfie,

I have sent you a PM. Check the envelope icon 'INBOX' on the very top line of the page.

Rgds,

John

Thread: Chuck key missing?
16/07/2017 10:19:16

A 'Senior Moment'......?

 

I'll get me coat.

Edited By John C on 16/07/2017 10:19:46

Thread: When is MT2 not an MT2 arbor
16/07/2017 09:42:15

Andy,

Check your message box - envelope icon and 'INBOX' on the very top line of the page.

Rgds,

John

Thread: Myford Super 7 chuck alignment issues.
03/07/2017 08:03:26

I'm with Hopper - check the spindle thread and register for burrs or dings.

Thread: Loctite 603 from China
10/06/2017 17:03:57

I too use Bondlock, with no complaints so far. It used to be available from Toolstation but not any more. I found it considerably cheaper than Loctite.

John

Thread: Bed regrinders?
07/05/2017 12:46:24

Brian Caddy of Slideway Services did my Super 7 bed and saddle. Excellent job.

John

Thread: Alfred Herbert Surface Grinder
04/05/2017 08:22:26

Hi Mike,

I have had very good results from the grinder, and it was definitely a worthwhile investment. One thing I have learned is that it is essential to dress the wheel regularly - I now do this before every use. Failure to do this leads to a clogged wheel and poor finish.

The grinder is fitted with a Brammer type belt and in cold weather the motor struggles to get up to speed.

I haven't stripped the machine down, although I suspect there will be some wear in the slides.

Looking at your photos your machine seems newer than mine, with the calibrated 'cross slide' hand wheel.

Mark - I wouldn't mind checking my ways if that would be possible - I am just north of York.

Best regards,

John

Edited By John C on 04/05/2017 08:26:12

Thread: TAPS, spiral or std
01/05/2017 08:20:12

Bucking the trend here, but... I have a set of spiral taps bought from Cromwell on special offer. Still not cheap though, but very good value for money and work very well indeed especially in blind holes.

John

Thread: Drill Press
05/04/2017 06:41:49

Hi Harry,

Whereabouts are you in the country? Depending on what the front to back limitation is, I may have just what you need! I am north of York.

I will send you a message with pictures.

Regards,

John

Thread: greetings from the Man Cave of Mayhem
26/03/2017 10:21:43

Hi Matt, private message sent,

John

Thread: Excellent service
05/02/2017 13:01:49

Another 'excellent service' award - Steve Cox of Landylift for the efficient moving of two large machines. No connection other than a satisfied customer.

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