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  • Users: roozle
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  1. roozle

    Worm Wheel moment of Inertia

    Can anyone point me in the right direction regarding calculating worm wheel inertia of a worm wheel gearbox. I assume the motor will have the worm attached so i will inore this. Rgs, Highest Regards, Roozle
  2. roozle

    Die-cast Zinc Vs Aluminium castings

    Can anyone advise me what problems I may encounter if I change from a zinc die-casting to an aluminium one. This is based on the existing casting tool being worn and I can introduce a big cost saving using aluminium. I understand I may need to increase rib thickness in certain areas. Any help...
  3. roozle

    Maximum load on

    Does anyone know a simple calculation to calulate maximum raidal load on an over-hung shaft (i.e - dc motor) supported by 2 ball bearings spaced? Cheers, Highest Regards, Roozle
  4. roozle

    Suppliers/Manufctures of special gears/ratchets.

    I am looking to buy some special form ractchet type wheel/cam (and eventually pawls) from our customers drawings. They are profiled across the teeth also. These are NOT standard off-the-shelf parts. I am having problems sourcing a supplier to manufcture them. Please advise if you know of any...
  5. roozle

    Ratchet and pawl manufactures

    I am looking to buy some special form ractchet type wheel/cam (and eventually pawls) from our customers drawings. They are profiled across the teeth also. These are NOT standard off-the-shelf parts. I am having problems sourcing a supplier to manufcture them. Please advise if you know of any...
  6. roozle

    Boronizing

    Boronizing, I understand this is an old fashion word. Is this similar to case hardening? or is it a differnt process. If somebody could shed a little light on this process. Thanks, roozle Highest Regards, Roozle
  7. roozle

    Welding opf MP35N

    Can MP35N be welded.? Also known as: UNS R30035; AMS 5758; Carpenter/Timken Latrobe MP35N. Thanks, roozle Highest Regards, Roozle
  8. roozle

    Stainless Steel A127 or A078

    Can anybody help me I am looking for Stainless Steel with a spec A127 or A078. Maybe there is an equivelent grade. I think It maybe a french specification. Thanks, roozle Highest Regards, Roozle
  9. roozle

    Life of toothed belt..

    I have a geared speed reducer with a toothed belt drive at the output. <Problem> - I am experiencing problems with the life of the belt. It is breaking after half the life of the reducer and I cannot increase the size width of belt due to size constraints. I have tried different materials of...
  10. roozle

    Worm Wheel gearbox - Pressure build up

    I have an application where I am employing a worm-wheel gearbox in which I am using a grease of '01' or '00' consistancy and i am getting a pressure build-up after a few minutes of running and the grease is migrating through the ballrace and potentially into the motor... I have introduced a...
  11. roozle

    Cost effective bronze

    I am re-designing a housing for a gear-head and at the moment the housing is aluminium and the gear stages have aluminium Bronze (HT20) bush bearings. My question is I would like to remove the operation of assembling the bearings and the cost of them. I propose to make the housing out of a...
  12. roozle

    Rubber coated Pinch wheel

    I am looking at an application where I need to feed a spearical object or round shaft using contoured feed wheels. I would like the two feed (pinch) wheels to have a rubber or urthlene edge to allow a positive feed of material. I do not know the process involved for attaching the rubber to the...
  13. roozle

    Protective Coating

    I need to determine the protective coating that is required by FAA or CAA, for aluminium parts located in aircraft interiors. Maybe Ali-Chrome coating or special yellow anodise??? Thanks for your answers. Highest Regards, Roozle
  14. roozle

    Motors with capacitors

    Can somebody please explain to me, what the reason for installing a capacitor to the terminals of a DC motor.?? Is it somthing to do with suppression or modification of terminal resistance.?? Thanks and best regards, Russell......
  15. roozle

    Belt drives

    I am looking at an application where, I am employing a belt drive system into a speed reducer. Specification: ** Output speed = 500rpm ** Output Torque = 1.5 lb-ft (2Nm) ** Ratio = ~9:1 Also noise is an big issue. Having never specified a bel-drive system before, please can anyone advise me...
  16. roozle

    Calculating leadscrew efficiency?

    I am trying to find out the efficiency of a leadscrew assembly. I am using a acme thread with an outside diameter of 0.67&quot; and a pitch of 0.1575&quot;. The leadscrew material is AISI 416se and the nut is Phosphur bronze PB2. I have load of 1200N. Can anybody shed any light on this...
  17. roozle

    Calculating worm axial force

    Can anyone advise me how to calculate the axial force, produced from the worm of a worm/wheel set. Thanks, Russell Tanner
  18. roozle

    High wear on worm &amp; worm wheel

    I am employing a worm & worm-wheel on application. It lifts and lowers a load, using an beam/arm. The problem I am experiencing is a large amount of wear on the worm wheel and sometimes there is a vibrating whine when the load is beimng lowered. Could the load be overspeeding the motor? One...
  19. roozle

    Propulsion calculating

    Does anyone know any software (FREE!!) that can calculate propulsion.?? Or simple prop design?? Thanks for your time. Russell Tanner

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