Product Description:

The VAC5-D22 spindle drive is produced by Okuma as part of the VAC Spindle Drives series. It is intended for machine-tool spindle service, converting incoming electrical power into controlled three-phase output so a CNC controller can regulate speed and torque with precision. In a machining center, this arrangement supports stable cutting performance during acceleration, deceleration, and changing load conditions while helping protect the spindle motor from overload. The drive also supports consistent spindle response during speed changes, which is important for maintaining surface finish and process stability in metal-cutting applications.

Its power section is rated for a continuous output of 22 kW, which suits medium-power spindles used on general-purpose lathes and machining centers. This output level supports sustained spindle operation in typical production cycles without requiring a larger drive for standard duty. Circuit protection in the control supply path uses a 5.0 A fuse, so the auxiliary circuit is interrupted if current rises above that level. Command and status signals are exchanged through an optical interface, providing galvanic isolation between the CNC and the power module. The housing is 750 mm high and 310 mm wide, and its depth is 290 mm, so cabinet space and airflow clearance can be planned accurately.

The installed weight is 41.5 kg, so lifting support or a rail guide is useful when sliding the chassis into position. The mounting pitch between the upper and lower fasteners is 200 mm, and the vertical attachment hole spacing is 714 mm, which helps align the unit on the panel without extra brackets. Four M8 mounting holes on a 289 mm attachment width secure the drive to the cabinet structure and provide a fixed mounting pattern for vertical installation. Motor position feedback reaches the control board through the dedicated XB-EPG (CN2) encoder port, while complementary resolver data is accepted on the XB-RES (CN3) connector for dual-sensor spindle arrangements. Separate feedback connections allow the control system to receive the spindle signals needed for regulated operation across a wide speed range.