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andy jones
Unregistered guest
Posted on Wednesday, June 21, 2006 - 11:34 am:    Edit Post    Move Post (Moderator/Admin Only)

RA Bevel Gearbox 4606-001

Hi i have a question regarding the above gearbox. We have a load of 500-600 grams. What is the MAX load this gearbox is reconmended for,

thanks andy
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 214
Registered: 10-2004
Posted on Wednesday, June 21, 2006 - 6:35 pm:    Edit Post    Move Post (Moderator/Admin Only)


The manufactuers do not publish a load figure although they are rather well made. The load would have been expressed as torque so whilst you say 500-600 grams, you would need to specify the distance of the load from the centre of the output shaft of the gearbox. As I'm sure you will appreciate, there is a big difference in trying to lift a load say 2cm from the output shaft to say 1m from output shaft.

How far is your load away i.e. diameter of the pulley or length of the arm?
Brendan Wheeler
Unregistered guest
Posted on Monday, September 1, 2008 - 3:07 pm:    Edit Post    Move Post (Moderator/Admin Only)

Im building a 1/10th scale A27m cromwell mk IV cruiser tank. Your (1410-011) Technobots Feather Gold 12V 150W would be perfect to be the drive if i could find a 25:1 reduction gearbox, ive looked into building my own using sprockets/chain and/or gears but the construction gets heavy and unwieldy. Do you have such a gearbox or know where i might be able to get one?
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 865
Registered: 10-2004
Posted on Tuesday, September 2, 2008 - 8:58 pm:    Edit Post    Move Post (Moderator/Admin Only)


If only! We would love to be able to help but so far we have had no luck in finding a gearbox at a suitable price. Industrial gearboxes are simply far too expensive for the hobby market.

If you need to work out the distance between centres of any two timing pulleys, then this calculator will eliminate the long calculations or trial & error for you.



  Timing Pulley Distance Between Centres Calculator  
  Large Pulley Teeth Number T  
  Small Pulley Teeth Number T  
  Pitch   mm  
  Belt Length   mm  
  Large Pulley PCD   mm  
  Small Pulley PCD   mm  
  Distance Between Centres mm  
  How to use the Pulley Distance Calculator  
  1. Enter the number of teeth on the largest pulley  
  2. Enter the number of teeth on the smallest pulley  
  Note: if 1:1 ratio, enter the same number of teeth in both boxes  
  3. Enter the belt tooth pitch in mm, i.e. T5 is 5mm, T2.5 is 2.5mm  
  4. Enter the belt length in mm  
  The resulting answer is shown in the bottom yellow box. For information, the PCD of the pulleys is also shown in the other yellow boxes.  
  In order to achieve the correct tension, one of the pulleys should be adjustable.  
  Disclaimer: Whilst we have taken evey care to ensure this calculator gives the correct answer, Technobots cannot be held responsible for any errors and their consequencies.