Shaft Extensions: All motors can be supplied with single or double ended shaft, according to customer request. Shaft length and other modifications can also be made to customer request. Number of Leads: All motors can be supplied with 4, 5, 6, or 8 leads; A connector can also be added on customer request. Custom Execution Number: We list some typical products for selection. We can also design and produce motor according to customer special request. Holding Torque: Holding torque is measured with two phase driver at the rated current.