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Member postings for DC31k

Here is a list of all the postings DC31k has made in our forums. Click on a thread name to jump to the thread.

Thread: Looking for a block of cast iron please
17/04/2021 14:20:53
Posted by Howard Lewis on 17/04/2021 12:16:52:

When you tighten the clamp screws for the tool, the cast iron is subjected to tension.

To quote from the original post "a toolpost support for my Chester DB10 to replace the compound".

Could you please posit a mechanism whereby a toolpost SUPPORT will be subjected to the tensile forces you mention.

I find it of great utility to read all of the words actually written in the original post rather than to omit or imagine some.

Thread: Greenwood Tools
17/04/2021 14:08:03
Posted by Mike guitar on 17/04/2021 12:54:30:

Kit-qd.....I've tried contacting on eBay viz spare inserts...I'm just trying to locate the manufacturer which will enable me to buy spare inserts

Greenwood's website is still alive and well. Details of the manufacturer (Sandvik) are given there and the insert code(s) are all there also.

https://www.greenwood-tools.co.uk/shop/indexable-inserts/insert-type-18-1405008.html

Thread: Threaded milling cutters
16/04/2021 14:59:48
Posted by Dave Halford on 16/04/2021 14:26:11:

You only need 4 sizes of collet

6mm 10mm 12mm 16mm

I have those. I tried a 1/2" shank cutter in the 12mm one and it was a little tight. The collet did not seem much use afterwards so it might be an expensive way to work. Similarly, the 16mm one was a bit loose and it was difficult to remove the mill after welding it into place.

Thread: Kuroda Boring & Facing head
14/04/2021 19:14:49

Everything below implies it is a clone of the Wohlhaupter UPA3...

https://www.model-engineer.co.uk/forums/postings.asp?th=119948

https://www.youtube.com/watch?v=MPPPORn6C7g

https://www.practicalmachinist.com/vb/general/user-manual-koruda-boring-head-312482/

http://www.wohlhaupter.com/downloads/operating-instructions/

http://www.neme-s.org/Shaper%20Books/Wohlhaupter/Wohlhaupter.pdf

https://www.model-engineer.co.uk/forums/postings.asp?th=166530

Thread: 5C collet chuck with integral DI-3 backplate,anyone bought one?
14/04/2021 14:30:17
Posted by Dave S on 14/04/2021 08:43:38:

I usually use the sleeve as it’s direct in the taper, and the drawtube is a little shorter.

But you can only use 5C in-spindle if the spindle taper will accommodate it.

If you happen to have a D1-3 with a 4 Morse taper, which is how I believe the Bantam is offered, it is too small. It is why 4 1/2 Morse was added to the range as it is the smallest that will accommodate 5C.

Thread: Abrasive belts
13/04/2021 07:34:26

Abrasive belts are specified by width and circumference and then chosen by grit.

So if you have the machine, cut open a used belt and measure it. Or use a piece of string.

See:

https://www.ukworkshop.co.uk/threads/abrasive-belts-for-sorby-pro-edge.47917/

https://www.axminster.co.uk/media/publications/product-bnr-103474-axminster-trade-ultimate-edge-gwm-review.pdf

where it appears that the width is the same but the girth differs by 5mm, which might be within the adjustment range of the tensioning mechanism.

Thread: BSW
10/04/2021 17:06:33
Posted by Howard Lewis on 10/04/2021 16:13:53:

Your thread gauges probably don't include a 2.3 mm pitch, the closest is likely to be 2.25 mm...

Could you kindly point me to any standard metric thread anywhere in the world that has a 2.25mm pitch.

If you are unable to fulfil the above, perhaps you could ponder on why any set of thread pitch gauges might include that pitch.

Thread: (bicycle) thread identification?
10/04/2021 08:03:14
Posted by jon hill 3 on 09/04/2021 23:02:41:

Again a book or website recommendation on threads going into pitch, tpi, history etc would be very helpful.

There is no one resource that will do that for you.

A few steps on your path to screwing utopia:

https://journeymans-workshop.uk/allthread.php

https://www.gewinde-normen.de/en/index.html

https://www.haguefasteners.co.uk/BoltingGuides/HagueFastenersGuideToScrewThreadSizes.pdf

https://www.npl.co.uk/science-technology/dimensional/npl-notes-on-screw-gauges

Thread: Help needed with identifying a tool
09/04/2021 15:16:40
Posted by Jeff Dayman on 09/04/2021 14:29:11:

Just in case you still want one though, the tool is called an adjustable pin spanner, seen at link below. Very good for use on nuts with drilled holes in the nut face...

Would you kindly postulate a mechanism whereby the round pins on the spanner to which you refer will fit without slippage in the square or rectangular cut outs in the nut the OP shows in his photograph. Thanks.

Thread: Chronos Wheel Engine
09/04/2021 10:53:42

Not plans, but a start...

http://www.jamesriser.com/Machinery/ChronusWheelEngine0001.pdf

http://www.jamesriser.com/Machinery/ChronusWheelEnginePage10001.pdf

Also http://www.jamesriser.com/Machinery/ChronosPinionMill.pdf

The spelling mistake somewhat impedes the search.

From: https://mb.nawcc.org/threads/chronos-wheel-cutting-machine-help.37443/

Thread: ER40 collet nut seized
09/04/2021 10:35:32

Isn't it galling when that happens?

Thread: BA screws and nuts
08/04/2021 19:00:43
Posted by Dougie Swan on 08/04/2021 17:57:34:

I used to buy my ba stuff from Mike Sandyford of "items" mail order

Is this the same source as the items ad in the magazine, I ask because it seems very hard, at least to me, to find anything on the website

I think the website to which you are referring is

https://itemsmailorderascrews.com/

Contact details and address are given at the bottom of the page. You can compare those with the magazine advert and see if they match. The blurb also says that the company was established in 1994 so that might provide a pointer if your purchases pre-dated that. The website states more than once that you should email for a price list and that transactions should be done over the phone. It is not an online shop.

Thread: Source of 2 inch balls for water pump
08/04/2021 14:37:58

http://www.dejaydistribution.co.uk/balls5.html

Thread: Involute tooth depth
07/04/2021 15:26:28
Posted by Howard Lewis on 07/04/2021 15:17:20:

If you use an Involute gear cutter, it is likely to be marked with the df number, which is the depth of cut.

More usually referred to as d + f .

If you search for 'd + f gear' or 'whole depth of gear tooth', there is a lot of material available.

For metric gears, this one is good: https://khkgears.net/new/gear_knowledge/abcs_of_gears-b/basic_gear_terminology_calculation.html

For imperial gears (not your current challenge), this one is good: https://www.bostongear.com/-/media/Files/Literature/Brand/boston-gear/catalogs/p-1930-bg-sections/p-1930-bg_engineering-info-spur-gears.ashx

Thread: Tailstock Die Holder (metric)
04/04/2021 18:36:00

Do you have a next-size-up-to-one-inch holder? That is perhaps infrequently used? If so, could you make a much thicker-walled shim and install it semi-permanently with Loctite? Would also need longer screws.

Thread: Beaver VBRP Mk 1 manual / info help
03/04/2021 11:49:00

To the best of my knowledge, the manual you have is all that is available. There is no specific manual for the Mark I model. That said, a Mark II Beaver manual is more help to you than a Mark I Bridgeport manual.

There is a thread here:

https://www.model-engineer.co.uk/forums/postings.asp?th=123926k

where you might find information on your model.

If you type 'beaver site:model-engineer.co.uk' into Google, you will find other threads here on this subject.

Similarly, if you type 'beaver site:mig-welding.co.uk' into Google, you will find all the threads on that forum on the subject.

Thread: 11/16 UNEF Drill size
02/04/2021 17:49:39

If you type your topic title into Google, exactly as you have written it, you will find the answer to your query.

E.g. https://www.gewinde-normen.de/en/unified-extra-fine-thread.html

It will also suggest you use a drill sized at 16.6 of those new-fangled continental millimetric units rather than the bizarre not-in-any-standard-range imperial number quoted above.

Thread: ER32 collets
31/03/2021 20:43:48
Posted by old mart on 31/03/2021 16:20:30:

When thinking about clamping a 3mm cutter in an er32 collet, it is unlikely that the shank of the cutter would be as long as the collet.

Rego Fix show up to four different possibilities for the internal arrangement of ER collets. See

https://us.rego-fix.com/system/files/docs/2017-09/RFAG_TD_ER_Spannzangen-Masse_EN_0.pdf

Thread: ER 16 / 20 or JT2S, JT33 and JT6 Straight shank tooling
30/03/2021 17:13:15

Look harder:

https://www.mscdirect.co.uk/ERI-48340C/SEARCH:KEYWORD/product.html

Thread: Colchester Bantam Mk1
29/03/2021 15:34:56
Posted by James Woodman on 29/03/2021 13:35:46:

I was hoping to find a user manual online, but no luck.

No luck or lack of proper effort?

Fourth post:

https://www.model-engineer.co.uk/forums/postings.asp?th=133708

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