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  • Users: sacem1
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  1. sacem1

    Max speed for a gantry crane before it toples

    I am posting in this thread as I can not see other more suited, We have this problem: A gantry crane 10 m high, 40 m wide and with a load carry capacity of 30 MT sits on railway trucks wich have 4 wheels resting on a railway ( 2 at each end + 2 midway)the distance between end wheels is 6.5 m...
  2. sacem1

    Moly coating on bed ways of lathes and HBM

    I have been offered a spray containing a solution of molibdenum bisulfide that creates a fine layer of dry moly coating on top of the bedways in lathes, milling machines and horizontal boring machines. You wipe the surface completely clean, spray the product and after a few minutes a dry dark...
  3. sacem1

    Replacing DC motor with stepper motor

    We have a Heavy Horizontal Boring Mill Column Type which has basically two movements one for the column along the bed the second for the head up and down the column. They are both powered by DC motors which I would like to replace with stepper motors in order to be able to retrofit a PC based...
  4. sacem1

    Part Winding operation of 3ph motors

    We have several machines which have 20+ HP motors used in machinery which is suposed to need all that power only on very special ocasions, most of the time the input power requiered will be less than half the motor power. As a result from this we have to start and keep operating high HP motors...
  5. sacem1

    How to refill a hole bored on a large casting HELP

    This question has also been posted on other groups as I'm really pressed on this one: We were drilling a 3/8" diameter hole for a lubrication supply line in a cast steel adjustment ring for a conical crusher (around 3 ton weight) the hole is 8 1/2" deep at 8" of depth the drill shattered and...
  6. sacem1

    Steel tube column filled with concrete, what load does it resist?

    I have used a leftover rolled a36 plate steel tube 15" diameter x 15' long as a column to attach a 15' jib crane swing arm with a 3 MTon winch. Plate thickness 3/16", column is embedded into a 3' foundation so 12' are actual column height. I filled the column with concrete (210 kg/cm2...
  7. sacem1

    screw conveyor that does not convey

    I have built and installed a 6" nominal diameter screw conveyor with troughs in U shapped steel body. Lenght of screw conveyor is 20' and its set at a 60º angle with the floor, has a single screw hanger at midpoint and a flat cover. The screw has to convey ground to mesh 25 sulfate amonia (the...
  8. sacem1

    DC generator braking for engine dyno

    I have posted this also in mechanical engineering other topics thread, but in case you haven't read it here it is for you: I am planning on building an engine dynamometer so that power changes due the modifications done to my aircooled VW engine used in my self built tubular dune buggy can be...
  9. sacem1

    engine dyno braking with DC generator

    I am planning on building an engine dynamometer so that power changes due the modifications done to my aircooled VW engine used in my self built tubular dune buggy can be determined. There is no dyno service around here and the equipment is going to be used only on my car and several friends...
  10. sacem1

    ASTM A514 Gr. B Steel need specs of this grade

    I've got a customer who specifies ASTM 514 Gr. B steel for the manufacture of a centrifugal fan rotor (8' diam) with thicknesses of 3/4" to 1/4" for a cement plant, welding should be by AWS 11018 rods and some parts requiere a complicated doble bend that will have to be done by spinning the...
  11. sacem1

    PC based CNC for HBM

    Hi folks: I have just bought a very nice and solid G&L floor type Horizontal Boring Mill wich originally had a NC control, well now it has nothing, the machine is in very good conditions but the control was dissapeared from it sometime ago, so now I own a non working HBM. I need information...
  12. sacem1

    Speeds for circular grinding Ni Hard castings

    We cast some saucer type disks called "Suction Liners" for the minning industry between 40" and 68" in diameter, weight from 800 lbs to 1800 lbs each in a cast iron with Ni added that gives an end RHN of 450. This pieces have to be heat treated to soften the pieces in order to machine them...
  13. sacem1

    Heavy lathe spindle runout problem

    I have a heavy T-Lathe the one that has the headstock supporting the spindle and 80" 4 jaw chuck and has a movable bed that carries the saddle. It is very solid (over 40,000 lbs weight the headstock) but old with cone pulley drive with 3 steps of gear reductions that can be conected or...
  14. sacem1

    Pink India cedar tree farm

    Does any one have experience with a tree farm exploiting the Agrocarpus fraxinifolius (India pink cedar tree)as I am interested in starting some plantations in Peru. Thanks SACEM1
  15. sacem1

    Steel columns filled with poured concrete for crane rails support

    I'm in the process of designing some welded plate square section columns to support over head crane rails. The section will be 12" x 12" with 18' height 3/8" A-36 plate welded continuosly on the corners with E70S MIG weld. In order to help during fabrication we will put square plates at 3'...
  16. sacem1

    Matterson Gear generating Attachment use

    I hope someone out there has in use or is experienced with the following equipment I have, its a device for setting up the blank and cutting it to make bevel gears the ID plate states the following: Matterson Gear Generating Attachment Model 12" Bevel Brit. Pat Nº 143735 serial Nº MTOE...
  17. sacem1

    Super Seven chassis design

    I'm starting to build myself a Lotus Super Seven replica but am starting from scratch not buying a kit from any supplier, I already got hold of Ron Chapman's book for the Locost S7 but find the design too fragile for fiting a Toyota 2 liter twin cam engine. The original chassis was 1&quot...

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