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| velocette:
Hi this is a "What I Did not a How I Did It" post Also posted in Hmem Stripped out All gears and counter shaft from mill head and replaced bearings With Taper Roller Bearings 30206 30 X 62 X 17.25. Grind down 1.5 mm from inner race. Fabricated brass shim shields .25 mm thick = 16 mm Height (same as original ball bearing) Fabricate and Fit "Poly Vee Pulleys calculated to give 1200 rpm 1900 rpm and 3500 rpm Drill and tap top of gear box to fit 12 mm aluminium mounting plate Removed torsion spring mechanism and fitted Longer rack to give 205 mm travel. Fitted "Air Spring" to counter weight of mill head 24 kg rated. Added rev counter from diesel engine 96 tooth disc and ABS wheel sensor from a Volvo as pickup 12 volt DC powered. Made and fitted stiffener for column Thanks to all who submitted their ideas to "Home Model Engine Machinist." The results are remarkable "Self Praise Again." No grumbling gears or power wasted making them spin Added photos of Belt Drive |
| Brass_Machine:
Nice job with the belt drive. I didn't make mine, but bough t it. Well worth it! I am going to be doing some of the other mods you described as well. Eric |
| Stilldrillin:
Nicely done Velo. :clap: I also bought mine. One of the best improvements to the mini mill. Though I would prefer a lower rev range...... David D |
| Bluechip:
I wonder if anyone has done this to the Warco WM16 etc. ?? The gears on mine make a hideous clatter sometimes .. Keeps me awake ... :( BTW while we're not really on the subject of Velocettes ... seen this ?? http://modelengineeringwebsite.com/Velocette.html BC |
| John Stevenson:
--- Quote from: Bluechip on February 02, 2012, 02:16:18 PM ---I wonder if anyone has done this to the Warco WM16 etc. ?? The gears on mine make a hideous clatter sometimes .. Keeps me awake ... :( BC --- End quote --- Done a few part conversions, replaced the motor to input shaft with belt drive to (a) make it a bit quieter and (b) up the speed for small cutters. John S. |
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