What Are The Gear Ratios Of The Square 2-Speed Jack w/ Crank TJD2SP-12000SP-F

Updated 01/05/2021 | Published 12/30/2020

Question:

How much faster is high speed Item # TJD2SP-12000SP-F than a standard jack of the same capacity. or revolutions per inch of lift for each would do.

asked by: Art N

Expert Reply:

I reached to RAM who makes the Square 2-Speed Jack w/ Crank # TJD2SP-12000SP-F you referenced, and confirmed that the high gear ratio is 6.43 handle revolutions per inch of travel, and the low gear ratio is 22.86 handle revolutions per inch of travel.

The high gear will be roughly 3.5x faster than a standard single speed jack with the same 10000lb lift capacity and 12000lb support capacity.

expert reply by: Samuel C