Right Angle gear motor, they are 4IRK  (80mm dia.), 5IRK(90mm dia.), 6IRK(100mm dia.). And IRK series motor, the shaft is RC ( hollow shaft type) or RT( with axile) for choice.

Gearbox of IRK series can be assembled to both AC and DC motor whose diameter is 80mm,90mm,100mm.

Following is data of 5I(R)K-90W：

5IRK-90W.pdf