Key Takeaways:
Direct-drive torque motors eliminate belts, gears, and their backlash and vibration. Paired with a hydrostatic film, they give high low-speed torque and clean motion for precision rotary tables.
The Hidden Cost of Belts and Gears
Belt- and gear-driven rotary tables introduce backlash, elastic wind-up, and transmitted vibration. At low feed they can also exhibit stick-slip. These defects directly limit achievable accuracy.

Direct Drive on a Hydrostatic Film
A direct-drive torque motor couples the rotor straight to the table. Marusaku uses the 485SJM-1350BH delivering 1350/2400 N·m, giving strong torque at low speed with no mechanical reduction. Combined with the non-contact oil film, motion is smooth from the first micron of rotation.
Result
No backlash, no belt wear, and no stick-slip means the table tracks commanded position exactly—exactly what sub-micron rotary work demands.