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    J head belt replacement

    What is the aftermarket number for a Bridgeport 1118-2120 belt?
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    Most of us would either make one or modify an off...

    Most of us would either make one or modify an off the shelf part to work.
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    Will definitely buy at least a couple in the most...

    Will definitely buy at least a couple in the most used sizes. I just hope it helps others avoid the same issues I had.
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    Milland was right on track when he suggested...

    Milland was right on track when he suggested "Drunken Threads". I made a drawbar from O-1, threaded on my HLV-H using a collet, short length and live centre resulting in the best thread I could cut....
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    Could you tell me what is the correct torque?

    Could you tell me what is the correct torque?
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    Tom, thanks for the reply and with a little...

    Tom, thanks for the reply and with a little tapping I was able to get runout less than .001"

    Replacement drawbar yielded same results as old one so I will be making one in the near future and will...
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    Thanks for all the good tips. Key is good and...

    Thanks for all the good tips. Key is good and doesn't bind, taper was just ground but removed only about .0005", just enough to touch it with the stone. Will try a new bar and report back.
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    I am suspecting the drawbar thus asking for...

    I am suspecting the drawbar thus asking for dimensions of a Bridgeport drawbar rather than an aftermarket. I will be trying a new replacement tomorrow and depending upon results either use it, make...
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    Numerous new and used collets were tried with...

    Numerous new and used collets were tried with similar results. I straightened the runout of the draw bar to less than .005" in the middle while holding the treads in a collet. I very much suspect...
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    Thanks for the quick replies: Michiganbuck,...

    Thanks for the quick replies:

    Michiganbuck, engaged about 15, not bottoming, added 1/2" of washers with same result.

    Milland, drunken threads a definite possibility with this KBC drawbar and...
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    Spindle runout issue

    J head Bridgeport, and it has .0002" runout at collet but .001-.002" runout 1" from collet. This is quite inconsistent changing every time the collet is removed and replaced. I tried a friends draw...
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    I use a step up transformer intended for step...

    I use a step up transformer intended for step down of 600 to 240V, 5000VA rating though about 2500VA is sufficient. This feeds an older Allen Bradley VFD, both purchased used. Only cost about $200...
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    What motor is on it? My Bridgeport has the 575V 3...

    What motor is on it? My Bridgeport has the 575V 3 phase and I simply used a transformer to boost 240 to 575 then cheap used VFD to run the motor. Was beating on it fairly hard again this aft without...
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    Try a 1N5401,2,3,4 as they are about 4 amps...

    Try a 1N5401,2,3,4 as they are about 4 amps continuous (depending upon lead length) and will effectively suppress the spike from the clutch coil. They will easily dissipate the coil surge while...
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    Feed issues Carlton lathe

    Working on a Carlton C3 lathe with feed issues. The feed screw is not connecting to the gear box, clutch appears ok and there is no drive to it. Does anyone have advice or a manual before I tear into...
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    Carlton C3 lathe manual wanted

    Working on a Carlton C3 lathe and need a manual. It has feed screw drive issues.
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    kilometers?

    kilometers?
  18. Would setting a couple long pieces of round stock...

    Would setting a couple long pieces of round stock ie 2" on the T slots then work out how to clamp down help? the tubing would then be supported by the round stock for a substantial length.
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    Excessive moderation is the surest way to forum...

    Excessive moderation is the surest way to forum failure. Many forums that I have participated in over the years have partially or totally succumbed to this issue and it only takes one or two...
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    My '38 Rolls is perfectly happy on modern fuel if...

    My '38 Rolls is perfectly happy on modern fuel if less than a year old however my modern carbed engines are not. Helping out at a local small engine shop almost all that have had fuel sit for more...
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    On my gravel conveyors I used eccentric locks on...

    On my gravel conveyors I used eccentric locks on the bearings. This way the set screws only have to hold the lock collar tight enough for the eccentric to lock the bearing in place. Note, on tail...
  22. Check resistance from point 10 to ground. Minimum...

    Check resistance from point 10 to ground. Minimum should be 24V/3A=8 Ohms. If any less, find the cause and it will most likely be the source of your problem.
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    I would just adjust the ramp up on start until...

    I would just adjust the ramp up on start until the VFD goes OL then back off (increase) the ramp time by about a third. How to look at it is a 1kw vfd could run a 10kw motor at no load if it drew...
  24. Look for a pulse width modulated DC drive. I have...

    Look for a pulse width modulated DC drive. I have built a couple for my own use but you can buy cheaper than building one. Properly designed full load torque can be maintained from nearly stopped up...
  25. A VFD would be the simplest solution and not...

    A VFD would be the simplest solution and not change the motor. Contact Automation Direct for VFD's and good tech advice from their experts.
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