By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for richardandtracy

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

Thread: 2 inch face mill problems
07/05/2018 14:46:33

Maybe you have it, HasBean. The steel -M2 side looks not too sad at all.

Regards

Richard.

Thread: Brakes..?
07/05/2018 09:13:53

I doubt if Delrin would be great. It's soft with a lowish melting point, so will wear fast and may melt. I always remember a time when my dad melted his bicycle brake blocks on a long hill - the old fashioned rubber on rim type - so am always wary of low melting point brakes.

Many early locos used timber as the pad. Could a little bit of beech do you? Does the kitchen chopping board need changing - the boss may be pleased with a new one.

Regards

Richard.

Thread: 2 inch face mill problems
07/05/2018 07:55:47

Ah-ha. The web Chronos website has spawned a Glanze site since I bought the holder, knowing TPAN as an acronym means I can now find the inserts. Thanks Jason.

Maybe that's the difference, the inserts I got from cskwin2015 do actually feel quite sharp on their edges. Not quite as sharp as the little ccmt06 lathe tool inserts, but not far off.

Regards

Richard.

07/05/2018 07:27:54

Jason,

Can I ask where you get tips for the cutter in the last photo? I have a 32mm end mill with similar tips but one fell out after the screw loosened a bit under the initial vibration on starting a cut and is now lurking somewhere in the workshop. I have been unable to source a replacement - possibly because I have no idea of their acronym - how could one find a CCMT06 without putting the name in?

But.. Surely those tips are horrendously blunt compared to the AMPD1604's where the edge is shaped and thinned to present a chisel edge rather than a scraper.

Regards

Richard

Thread: sherry shelf life.
06/05/2018 22:08:38

Takes us about 5 years to get through a bottle of sherry. No worries with it. The one that goes off (solid) is Baileys Irish Cream. Given up on it as we don't drink it fast enough. Even a bottle of wine lasts 3 weeks at home. The last glass is usually a bit sour.

Regards

Richard.

Thread: 2 inch face mill problems
06/05/2018 21:42:58

I have a similar cutter bought from cskwin2015 on e-bay, and was using it this afternoon without problems. I do not have power feed available, and was using it at 1600 rpm, and approx 50 mm/min, maybe a little faster, one turn of the feed handle every 2-3 secs and 2.5mm per turn. Why such high rpm? Well I had the belts set up for a 6mm cutter and figured the tips could be worked very hard on a CNC machine, so could stand high heats, which meant fast speed if the feeds were low. And I was too lazy to change the belts. The chips came off blue.

I think Jason has it right in suggesting you check for concentricity in the machine. Also, put it cutters down on a flat surface and see if it rocks between 2 cutting tips, that would be a good indicator if one insert was too low and doing all the cutting. Check if the insert is over size, change if it is, but if not, consider complaining to banggood or remedial work with a Dremmel on the tool holder. Shouldn't be needed, but could save the day.

Regards

Richard.

06/05/2018 17:50:15

What is the toolholder design?

Is it one with a common insert holder and an interchangeable taper? If yes, investigate the tightness and fit of the joint between the two bits.

Regards

Richard.

Thread: Weldon Shank Tool Holding
05/05/2018 21:28:07

I will be the first to admit I've not had a lot of experience milling, but I have used Weldon, Clarkson, MT and ER 32 collets. I now use ER32 almost exclusively. I had tool edge out in MT tapers - I wasn't really willing or able to tighten it enough. Weldon worked well, but the expense to cover each and every size I was likely to use was excessive. I already have ER 32 collets to hold pen making materials from 6-20 mm, so the choice was a no-brainer. The results I get are acceptable commercial quality, meeting Ra1.6 standards without trouble. This with mills bought direct from China, in a collet holder also bought direct from China, using collets bought one at a time from Axminster. All using the milling head of a Warco WMT300, a Clarke CL500 clone. According to some of the more opinionated authorities here, everything about the equipment I use should make the achievement impossible. As it isn't, I'd suggest you don't get too hung up about perfection and think more about what is acceptable to you in your situation.

At work, until he retired in March, our machinist used ER50 collets on the works mill and never had a mill edge out. If he had, the whole factory would have known. He was not one to hide his feelings.

Regards

Richard.

Thread: Service in 2018
04/05/2018 15:35:28

With me, I ordered from Chester tools on Tuesday, received a despatch e-mail Wednesday, only to find it had arrived half an hour before the e-mail when I got home from work. Quite amazed at the time machine technology available these days.

Regards

Richard.

Thread: The Workshop Progress thread 2018
04/05/2018 04:38:31
Posted by Jon Gibbs on 03/05/2018 10:41:29:
Posted by John Haine on 02/05/2018 22:52:13:

Why wouldn't a lathe one work? The geometry should be just the same whether the tool or the work rotates.

+1, I use several cheap Chinese SCLCR boring bars with CCMT-06XXX inserts shortened and turned down to 3/8" in my boring head very successful...

The banggood ones come with 10 inserts for around a tenner which is under the £15 import threshold if you can wait that long (2-3 weeks).

HTH

Jon

Absolutely agree on this. If you start with the -S10 there's less to turn down and the holder's cheaper than the S12 too. Think I got my -S10 for under £4 last year, but without inserts (of which I already had enough) from cskwin2015 on E-Bay.

Regards,

Richard.

Thread: sundial
30/04/2018 21:23:06

That looks amazing.

I am always astonished when someone uses one of my programs. I am further astonished when the results look quite as they do. I am amazed at the results. You have done a remarkable job.

Regards

Richard.

 

Edited By richardandtracy on 30/04/2018 21:45:57

Thread: Hexagon Head v. Allen/Cap Head screws/bolts
27/04/2018 18:20:27

Unless the thread is fit & forget, always helicoil aluminium. In for a world of grief otherwise.

Regards

Richard.

Thread: BA versus metric reduced-head fastenings
27/04/2018 11:23:45

Always amuses me when I see the BA series described as non metric. The whole definition is metric - not one bit of imperial in it. It's just not an 'M' series thread.

The pitch of BA thread n in mm is P = 0.9^n rounded to 2dp. The major diameter is 6 * P^1.2. The head size is 1.75 x major diameter. ( **LINK** .).  .

Regards,

Richard.

 

Edited to get rid of spurious emoticon

Edited By richardandtracy on 27/04/2018 11:24:52

Thread: Making spokes into spokes
26/04/2018 15:45:44

If you are really concerned about ham-fisted machining shattering the spokes, heat up & flow soft solder into the recesses between the spokes, machine the spokes free and then melt out the soft solder.

The chances are that if you have a really sharp tool and take tiny cuts, you'll get to the point where you have foil between the spokes and it will deflect out of the way. At that point a penknife blade will act as a deburrer to cut the last bits away.

Regards,

Richard.

Thread: Rotary table
26/04/2018 14:23:57

Used excel & the brute ignorance & force method.

Regards,

Richard

26/04/2018 13:50:17

You are looking for 0.676691729 turns of the handle each time (90/133)

With the 99 plate and 67 holes each time, you will get an error of 7.5947 x 10^-5 turns error each hole, or a total error of 0.0404 degrees. I am assuming the 99 plate is attached to the handle & rotates once per 4 degrees.

Regards,

Richard.

 

Edited By richardandtracy on 26/04/2018 13:52:36

Thread: Pressure as a unit of time
26/04/2018 12:59:39

Was reading 'Echoes of the Oil Country 4' last night & Bill Osborne talked of using a modified pressure gauge as a dial gauge. This was 1901/1902. Seems redundant pressure gauges have been used for other purposes for well over a century.

Regards,

Richard.

Thread: 10 inch Mortar Scale Model
26/04/2018 12:34:26

Interesting to see how they developed. The 1886 pattern 12" mortar is much more sophisticated in its carriage: **LINK**

Regards,

Richard.

Thread: Hexagon Head v. Allen/Cap Head screws/bolts
26/04/2018 12:16:41

Cap heads are grade 12.9 (1200 N/mm^2 ultimate, 1080 N/mm^2 0.2% Proof). Hex head screws/bolts are usually grade 8.8 (800 N/mm^2 ultimate, 640 N/mm^2 0.2% proof) or weaker. If not marked, hex heads are grade 4.6, (400 N/mm^2 ultimate, 240 N/mm^2 proof), same with studding. Nuts are grade 8 by default, and are at least as strong as a grade 8.8 bolt/screw.

The grade 12.9 material is less shock tolerant. So, for strength use cap heads, for shock tolerance, use hex heads.

The head of a grade 10.9 button head is weaker than the thread, and under tension a button head will have its head pop off before the thread snaps.

Regards,

Richard.

 

Edited By richardandtracy on 26/04/2018 12:20:25

Thread: N.A.M.E.S 2018
24/04/2018 08:45:01

Phweee

There are some incredibly skilled & patient people around. Thanks for the links. Foolishly I looked for N.A.M.E.S 2018 on Google too. Based on that I understand someone irrelevant has done what many mothers do - had a third one quite quickly. Oh joy.

Richard

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
Eccentric July 5 2018
Eccentric Engineering
Warco
TRANSWAVE Converters
cowbells
Meridienne oct 2019
ChesterUK
Ausee.com.au
Allendale Electronics
emcomachinetools
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest