Quantcast

Rockwell scroll saw

UKworkshop.co.uk

Help Support UKworkshop.co.uk:

Jaco

Established Member
Joined
15 Dec 2002
Messages
432
Reaction score
0
Location
Gauteng RSA
I am busy rebuilding an old scroll saw.
Got a motor that runs at 1450rpm.
Now need a pulley on the motor and two pulleys on the saw.
How do i calculate the sizes of the 3 pulleys to get the right saw speed?
The saw must run at 800rpm and 1275rpm. :D :D
 

Johnboy

Established Member
Joined
22 Mar 2004
Messages
598
Reaction score
0
Location
Rochford, Essex
The circumference of a pulley is directly proportional to the diameter. In other words if the pully size doubles then the circumference doubles. So to reduce the speed by half the pulley on the saw needs to be twice as big as the one one the motor.

For the speeds you quote if the pulley on the motor is 100mm then the saw needs pulleys of 114mm and 181mm.

John
 
Top