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Member postings for DMB

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

Thread: Actual diameter of 13/16" die holder in wrench
11/08/2010 09:23:15
Hi Frank,
All my various sized / makes dies fit in the various makes diestocks with space to spare - sort of slack fit. Also my double -ended tailstock die-holder from GLR, holds dies with a bit of room to spare.
My usual method is to chamfer end of rod/bar in 3 jaw. I tighten central screw which opens up die and loosely screw up the 2 side screws. Threading jollop on end of work and start the threading. After  say 3 turns, unscrew die from T/S holder, release from chuck and mount work vertically in bench vice and fit Die Stock to die to continue. After removing die from work, try screwing work in to female thread or try fitting a nut. If good fit, job done. If to tight, slack off centre screw and tighten 2 side screws and start again using Die - Stock.
Sorry if this sounds long-winded but I have only explained in  minute detail my successful method which is small improvement on what I was taught at school.
Hope this helps.
John 
Thread: In search of Peter Rawlinson
06/08/2010 15:34:47
SEGB,
Carpal tunnel Syndrome can be operated upon, so given that there is no reason for PR not to have an operation, he could get this fixed - I know another  model engineer who has.
John.
Thread: bioler makers
29/06/2010 15:18:02
Use a reputable mak e.g., Helen @ Western Steam.
29/06/2010 15:17:55
Use a reputable mak e.g., Helen @ Western Steam.
Thread: Help with making small counterbores
11/06/2010 11:56:23
Hi all,
Whats wrong with using an endmill or slot drill to scrape a small amount of taper down to a flat - bottomed hole? It may be technicaly "wrong" but if it does the job, why worry or amI missing something? Can anyone please explain why not?
Thread: Low rev. dynamo
11/06/2010 11:41:24
Hi all,
I noticed Roger Hart`s comment about low frequency ac. I do realise that oyu need pressure in the form of enough Volts to overcome resistance in the human body nad if Volts high enough can be dangerous BUT as I understand it, so can low frequency ac.
Possibly, lower volts than mains voltage, coupled with lower than mains frequency, could be a killer - be very careful!
Not sure, but I think thats how the electric chair used in USA works - gradual reduction of frequency.
John. 
Thread: Milling collet arbor jammed in milling machine
04/06/2010 16:24:01
Julian,
Further to prev. post,  Taller nut at top so spanner fits without being obstructed by rivetted cross-pin. I milled small flats on 3 corners of large hex to start tap drill, giving thicker metal to receive the grubs.
Spanners on the 2 visble hex nuts and twist, causes drawbar to shove the MT forward
 out of its socket.
John.
04/06/2010 16:19:05
Julian,
"Been there, done that"
My long-term solution as follows.
Trapped nut system works like a dream - try it!
I made new drawbar with nut just touching top of mill spindle, remove, cross-drill + pin.
Large AF hex bar bored out to fit over top of mill spindle and locked on to it with 3AAllen key grubscrews.The rest of it drilled right thro` clearing size for drawbar thread. Make new smaller AF nut, taller than standard, fit  on top end D-bar + wind down to just touch top of large AF nut, cross-drill + pin.
John 
Thread: Myford dividing head
19/05/2010 15:14:46
The 2 arms are meant to be locked together at a spacing of however many holes required + 1 for plunger, exactly as Jason B has said. Reason is so that the 2 locked arms can be swung round so that other finger touches plunger then plunger moved around and inserted against other arm -  a quick and foolproof way of counting holes.
 
Thread: Cutting Bevel Gears
24/04/2010 22:39:12
Hi macmarch,
I bet someone, somewhere, is flogging that book on ebay for much less than £60. Give it a try.
John.
Thread: Pop-up for digital.
22/04/2010 23:46:54
I get that pop-up every time I try to view posts. Am getting a little tired of it especially as its of no interest.
Thread: Ball Nose Mill Cutter, did I break it?
22/04/2010 23:44:43
Hi Aidan,
Try using a carbide cutter, which will not be blunted by chilled iron like HSS. Or use a small rotary grindstone as supplied with the hand held rotary tools.
If you can, get a proper Clarksons milling chuck and screwed shank cutters to fit. Trust me, their the "bees knees."!
John
Thread: Recommend oil can for oiler ports (on lathe)
22/04/2010 23:39:44
I found that those pump oilcans usually painted red, leaked and made ahell of a mess, wasting expensive oils. Bought an expensive "Reilang" oilcan - no waste at all!
Can anyone recommend an improvement upon those awful little spring loaded ball oilers, please? 
Thread: X2 type mini mill PCB speed control
19/04/2010 10:10:43
Hi John,
Long term answer and cheapest in the end is to have permanent elec. supply and buy lo-wattage heater or make el-cheapo like I did and trust me it works perfectly, well, in my shed it does. I believe there is such a thing as a Piano heater, 15w. Or find/make 3-ply wood box to protect bulbs and fit 4 batten-holders in bottom, connected in series so the 4x60W bulbs just glow. I found this works perfectly under thick plastic cover over mill and very cheap to run. Just be very careful to ensure connector screws tight and insulated. SWITCH OFF b4 you use mill! 
Thread: Tap Magic
19/04/2010 09:47:59
Sometime ago one of the trade stands at an exhibition was selling tapping jollop in small tubs as used by Trefolex but with no labels. It was the colour of LNER green paint and smelt different ot Tref. Stand holder assured me that labels had fallen off and it was definitely Tref. and it was new formula.  It was useless so binned it. Serves me right I suppose and I genuinely cannot remember who it was. Watch out if you are the guilty one reading this you toerag, because if I see that muck on sale again I`ll buy some and give it to Trading Standards and tell Tref.`s makers.
19/04/2010 09:38:38
Right hand ads r obscuring the posts again.
I DO swear by Trefolex but I often use cleanoils from the kitchen especially rape seed.
Used once for say, chips, got a few bits in it so filter + store in small bottle - very good !
I usually use Trefolex for tapping/Dieing and a well - washed out washing up liquid squeezy bottle tospray drills. Have also used surface cleaning trigger bottles.
Both types deliver far too much and make awful mess so started using 2" high squeezy bottle with fine spout, ex - hair colour (wifes!). Perfect!!
Have not tried other jollops listed above so cannot comment on their efficacy.
Have tried excess fish oil from small sardine tins and the like but tend to be smelly, goey generally unsatisfactory but do work.
Thread: Speedy 5 inch valve gear revisions.
31/03/2010 21:16:20
Hi Robert,
I have got around 80 years of Model Engineer and Don Youngs mag LLAS, most copies and I dont recall DY having tackled LBSC`s Speedy VG. Are you getting confused with LBSC`s Maid of Kent? Both DY and K N Harris re-designed that VG in ME. Unfortunately I cannot remember when but feel both were 1970`s/80`s.
If I am wrong and Speedy`s VG did get amended, please let me know.
Thanks, John.
 
Thread: Keeping it Clean
30/03/2010 09:14:27
Terry,
My mill heater is home-made 3-ply box with 4 brass batten-holders in `bottom` and 4 x 60W old-style bulbs. Batten- holders connected in series so bulbs only glow but give off surprising amount of warmth yet use very little electric. This contraption switched on 24/7/52 except in hot weather, Jun-Aug especially if dry weather. The bech mounted Fobco Star drill has a builders bag hood and another folded in half on table, no heat.
Tools and materials on bench covered with large thin sheet of plastic ex-wrapper for roll of fibreglass roof insulation.Just draw it back to one end when I want to butcher some metal.
My method is cheap to run and VERY effective! By the way, it is a bit warmer down here in sunny Brighton!
John
30/03/2010 09:03:27
Terry,
My wooden shed workshop contains mill in North East corner and Myford in North West corner and door in middle of North wall. Plastic Myford cover on lathe and very thick and very large plastic bag hood over mill + umpteen builders merchants sand and gravel bags seal front end + each side of table. Some years ago, I would go into workshop on a sunny morning and find  mill table covered in water and rest of it dripping but Myford was dry! I uessed that hot sun on South end of shed caused sudden hike in air temp. causing mill to sweat.Shed now got South wall and roof covered in large bubble wrap between layers of felt. Whole shed covered in felt. Inside of roo f has 2" polystyrene sheet. Inside walls have 3-ply  and voids stuffed with fibreglass roof insulation. Mill has small heater which cured condensation and Myford no heater.
Thread: For Sale section - can't choose groups
29/03/2010 16:28:53
Hi John,
I have got same problem.
John
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