I am just about done cnc'ing my X3 mill and I would like to increase the max spindle speed as well. I see a fairly easy way to swap the belt driven pulleys on the primary side of this mill for a quick boost in spindle speed. But I just can't seem to figure out how much it would actually increase.

This is the the gearing information I can provide and hopefully somebody better at math can help me.

The motor is rated 4000rpm.

The motor uses a 16 tooth pulley belted to a 26 tooth pulley connected to a 2 speed gear box.

The gear box has 2 speed ranges and I did not count the teeth but in low speed gives a max spindle speed of 1000rpm and high range is 2000 rpm max.

If I swap the 26 tooth primary pulley to the motor and the 16 tooth to the other shaft to over drive the primary side, can anybody figure out my new max speed ranges in both high and low range?

Thanks for any help!

Steve

This is the the gearing information I can provide and hopefully somebody better at math can help me.

The motor is rated 4000rpm.

The motor uses a 16 tooth pulley belted to a 26 tooth pulley connected to a 2 speed gear box.

The gear box has 2 speed ranges and I did not count the teeth but in low speed gives a max spindle speed of 1000rpm and high range is 2000 rpm max.

If I swap the 26 tooth primary pulley to the motor and the 16 tooth to the other shaft to over drive the primary side, can anybody figure out my new max speed ranges in both high and low range?

Thanks for any help!

Steve

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