A standard Haydon motor part number consists of 7 digits to 10 digits – XXXXX-VV-XXX.

· The first two digits indicate the motor’s series or size (in mm). Example: 35000 Series = 35 mm sq.

· The third digit or letter indicates the motor’s step angle Example: F = 1.8° non-captive;
H = 1.8° captive or external linear; J = .9° non-captive; K = .9° captive or external linear
(NOTE: External linear actuators have the prefix “E” to distinguish them from the captive actuators; High Temperature actuators require the prefix “T”)

· The fourth digit indicates the number of leads. (4 leads for bipolar; 6 leads for unipolar).

· The fifth digit indicates the travel per step (see chart) Example: N = .00012” (.003048 mm)

· The sixth and seventh digits indicate the motor’s voltage. Standard voltages are 5 (05) and 12 (12) V.
We also have low inductance coils available for chopper drives. Custom voltages are also available.

· Digits eight, nine, ten indicate captive motor travel or any other specialty item.