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  • old mart's Avatar
    Yesterday, 02:47 PM
    There is a flat on the pin, if using vice grips, hold on the flat and gently see if it will rotate a little in either direction while pulling it. It...
    18 replies | 571 view(s)
  • old mart's Avatar
    09-16-2017, 04:08 PM
    I surprised myself the other day when getting chatter while turning soft lathe jaws. I switched to a tip designed for aluminium which not only gave a...
    8 replies | 361 view(s)
  • old mart's Avatar
    09-16-2017, 02:31 PM
    Thanks everyone, I'll be trying for 0.0015" interference and heating to about 150C. We have a cheap press at the museum now, 12 ton from eBay, no...
    9 replies | 652 view(s)
  • old mart's Avatar
    09-15-2017, 07:16 PM
    I am about to bore an aluminium wheel hub to fit a 6204 2RS ball race. The old bearing was loose in the housing, so I have elected to fit a slightly...
    9 replies | 652 view(s)
  • old mart's Avatar
    09-12-2017, 08:03 AM
    It's a shame I didn't have a camera when I was a kid as the speed controls were what stuck in my mind most along with the name. I spent a year at...
    7 replies | 527 view(s)
  • old mart's Avatar
    09-11-2017, 11:47 AM
    I started at a secondary modern school in 1960 and in the metalwork classroom were about four Colchester Student lathes, square top, with the...
    7 replies | 527 view(s)
  • old mart's Avatar
    09-09-2017, 03:52 PM
    Aluminium would be better than steel to practice on, or even Delrin sheet of the required thickness which is self lubricating and quiet.
    14 replies | 848 view(s)
  • old mart's Avatar
    09-09-2017, 03:44 PM
    old mart replied to a thread What did I buy? in General
    Better start making clocks and watches. You might have difficulty fitting the four jaw chucks to the lathe.
    34 replies | 3252 view(s)
  • old mart's Avatar
    09-08-2017, 12:40 PM
    old mart replied to a thread Advice needed on gears in General
    Having almost finished the imperial to metric on the Smart & Brown model A, I have the list of the actual gears that will be used: 125/127...
    15 replies | 1428 view(s)
  • old mart's Avatar
    09-08-2017, 11:52 AM
    We are so lucky to have Hammerite paint in the UK, smooth or hammered finish and no teal.
    65 replies | 4599 view(s)
  • old mart's Avatar
    09-08-2017, 11:39 AM
    Easy to do tapered threads in an NC lathe with a bit of programming.
    32 replies | 1958 view(s)
  • old mart's Avatar
    09-08-2017, 11:29 AM
    old mart replied to a thread OT; Steel gas cans in General
    In the UK, the old fashioned 2 gallon cans are illegal to use if they are of soft soldered construction. I didn't know that cans of over 10 litres...
    35 replies | 2566 view(s)
  • old mart's Avatar
    09-08-2017, 11:21 AM
    old mart replied to a thread Milling a keyway in General
    The maximum speed that the drill-mill can manage is only 2140 rpm, a bit low for 3mm cutters.
    7 replies | 566 view(s)
  • old mart's Avatar
    09-08-2017, 11:09 AM
    old mart replied to a thread boring spur gears in General
    With most lathe changewheels, you have to slide and swing the central one (idler or compound) to adjust the backlash and mine run ok with minimum...
    7 replies | 644 view(s)
  • old mart's Avatar
    09-08-2017, 10:50 AM
    I have had excellent results using the shiny, sharp inserts designed for aluminium in the lathe on softer grades of steel, but have yet to try some...
    16 replies | 780 view(s)
  • old mart's Avatar
    09-07-2017, 04:14 PM
    old mart replied to a thread Milling a keyway in General
    I had thought of just a little epoxy resin and filing the excess off but there was no need. The end mill cost me about 4 on eBay, a good make, I...
    7 replies | 566 view(s)
  • old mart's Avatar
    09-07-2017, 04:07 PM
    old mart replied to a thread boring spur gears in General
    It was one out of five that was poorly manufactured, I looked closely at the teeth and they appear even, and more importantly, it meshes consistently...
    7 replies | 644 view(s)
  • old mart's Avatar
    09-07-2017, 03:51 PM
    In post #12 , I was only comparing the difficulty of getting a compound (top slide) parallel to the lathe axis with re aligning a headstock. Perhaps...
    32 replies | 1958 view(s)
  • old mart's Avatar
    09-07-2017, 03:44 PM
    old mart replied to a thread Milling a keyway in General
    I was fortunate that the key is very long and is held in the shaft's slot by a keyed inner spacer, so my rather deep slot didn't matter. I did the...
    7 replies | 566 view(s)
  • old mart's Avatar
    09-07-2017, 02:49 PM
    old mart started a thread Milling a keyway in General
    I had three gears to modify for lathe changewheels which needed a 1/8" keyway in a 3/4" bore about 7/8" long. I have a nice new 3mm four flute...
    7 replies | 566 view(s)
  • old mart's Avatar
    09-07-2017, 02:24 PM
    Commonly, to produce female pipe threads, a tap with tapered sides is used, not to be confused with a taper tap for parallel threads. Probably not...
    32 replies | 1958 view(s)
  • old mart's Avatar
    09-06-2017, 02:29 PM
    A lot of the so called HOME shop users are wealthy, if the Kurt vice thread is anything to go by.
    11 replies | 741 view(s)
  • old mart's Avatar
    09-06-2017, 02:22 PM
    I am also a fan of the aluminium cutting inserts, you can take smaller cuts as they are sharper. I have a 12mm twin flute indexable endmill which...
    11 replies | 1108 view(s)
  • old mart's Avatar
    09-06-2017, 02:11 PM
    old mart started a thread boring spur gears in General
    I have been boring some spur gears to use them in the Smart & Brown model A so that it can produce common metric threads. The 125/127 is fully fitted...
    7 replies | 644 view(s)
  • old mart's Avatar
    09-04-2017, 02:28 PM
    old mart replied to a thread how to cut peelable shim in General
    If you use wood, go for fine grained hardwood planed smooth. I've had a pair of left handed Fiskars scissors bought 25 years ago, they are top...
    14 replies | 914 view(s)
  • old mart's Avatar
    09-03-2017, 12:17 PM
    old mart replied to a thread slotting on a lathe in General
    I have three 1/8" keyways, less than 1/8" deep to produce in 3/4" diameter by 1/2" deep holes in a fairly soft steel. Most of the kit shown is too...
    12 replies | 963 view(s)
  • old mart's Avatar
    09-03-2017, 11:47 AM
    old mart replied to a thread heat sink fins in General
    I'm with the thermal adhesive supporters. Roll the inner flange round long enough to control the pitch of the fins, and have an easy sliding fit....
    38 replies | 1967 view(s)
  • old mart's Avatar
    09-02-2017, 05:50 PM
    With oil like that, nothing less than a complete strip down and clean would be carried out if it was mine.
    16 replies | 1241 view(s)
  • old mart's Avatar
    09-02-2017, 05:43 PM
    To eliminate possible errors caused by foreign matter contamination, the chuck should be dismantled and thoroughly cleaned. Inspection of the 2 1/4 X...
    40 replies | 1785 view(s)
  • old mart's Avatar
    09-02-2017, 05:09 PM
    old mart replied to a thread Mitutoyo 6" Caliper in General
    Press your thumbnail around the edges of the label and the holes where the screwheads are located show up. It's easier to see if there is light...
    19 replies | 1683 view(s)
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About old mart
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