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MAB17 - NEMA17 Brake

Electronic brake for all NEMA17 motors.
The electronic brake is designed to be mounted on step- and servo motors with NEMA17 flange 42x42mm. Brake itself have NEMA17 mounting dimension but flange size is 46x46mm. Brake can be mounted directly on stepper motor from JVL MST17x and also JVL integrated stepper motor MIS171, MIS173, MIS176 with 5, 6.35 and 8mm shaft. Brake can also be used on any other brand motor that use NEMA17 standard and have 5 , 6.35 and 8mm shaft. Output shaft can be 5 or 8mm. Shaft collars ring with 1 screw is used to tighten brake on motor shaft.
A high quality 24VDC electro-magnetic spring brake is mounted inside the housing. The brake use hub connection to brake disc so it can be mounted on motors with axial play. Holding torque is 0.5 to 0.7 Nm.
The brake is used when it is desired to hold the motor shaft fixed at power off, or when the motor is used in a vertical linear application. When 24 VDC is connected, the brake will be deactivated and the motor can turn freely. It is only recommended to use the brake only as a holding brake and not as an emergency brake.
All brake are equipped with M8 4 pin male connector for 24V control voltage.

  • Flange screws are not included, we recommend M3x60
  • In and output flange is equal Nema17 so a NEMA17 gear can be mounted on the front of the brake but notice the 4 mounting holes are turned 30 degree
  • With purpose can brake shaft move forward and backward 1-2mm to absorb potential temperature extensions
  • Pilot diameter is meant to be 27mm and not 22mm which is standard on a NEMA17. Due to tolerance in brake pilot or shaft measure can there be a risk that motor ball bearing can have limited lifetime if brake and motor have same pilot diameter. Remember to follow correct mounting procedure


Brake part number
Input shaft (Note 1)
Output shaft Protection grade Weight Length Photo
MAB17M-.50NX2F35 8 mm round / 24 mm deep 8 mm with key / 24 mm long IP42 0.39 Kg 62.7 mm
MAB17M-.50NX2FX4 8 mm round / 24 mm deep 8 mm with key / 24 mm long IP65 0.39 Kg
62.7 mm
MAB17M-.50NX2F16 8 mm round / 24 mm deep 5 mm round / 20 mm
IP42 0.39 Kg 62.7 mm
8 mm round / 24 mm deep 6.35 mm D-cut / 20 mm
0.39 Kg 62.7 mm
6.35 mm round / 24 mm deep 5 mm round / 20 mm
0.39 Kg 62.7 mm
6.35 mm round / 24 mm deep 8 mm with key / 24 mm long
0.39 Kg 62.7 mm
Note 1: Order sleeve HSHS17G08M-M05M for 5mm input shaft. Order sleeve HSHS17G08M-M06J for 6.35mm input shaft.
Note 2: All brakes with M8 4 pin male connector.
Holding torque Nm 0.5 to 0.7*
Backlash degree <3
Radial load Fr [N] 300
Axial load Fa1 Motor ball bearing
Axial load Fa2 [N] Motor ball bearing
Inertia [Kgcm3] 53 mm long 0.049
Inertia [Kgcm3] 57 mm long 0.049
On time [ms] 10
Off time [ms] 40
Current @24 VDC [A] 0.175
Power @24 VDC [W] 4.2
Pull in voltage [V] >16
Drop-out voltage [V] <3.5
*Contact JVL for selected brake with >0.6 Nm.

Accessories Part number Photo
Sleeve 5.0 to 8.0 mm HSHS17G08M-M05M
Sleeve 6.35 to 8.0 mm HSHS17G08M-M06J
Sleeve 5.0 to 6.35 mm HSHS17G06J-M05M
Shaft sealing IP65 MO0216
O-ring between brake and motor MO0033
Cable M8 female angle 5m. Pin 1:blue (0VDC), Pin 2 Brown (24VDC) , Pin 3 and 4 (NC)
Cable M8 female angle 10m. Pin 1:blue (0VDC), Pin 2 Brown (24VDC) , Pin 3 and 4 (NC)
1: Motor clamp in correct position where shaft slit and collar slit are alligned.
2: Mount brake on motor.
3: Pull brake shaft to outer position.
4: Tighten the 4pcs M3 flange screws with low torque <0,1Nm
5: Tighten the clamp collar screw M2.5 with 2Nm
6: Tighten the 4 pcs M3 flange screws with torque 4 to 5Nm
Special NEMA 17 brakes
Special front mounted brake part number
Input HUB shaft
Output shaft Protection grade Weight Length Photo
MAB17M-.50V03FAA 10 mm Not possible. Brake Hole 9 mm IP00 0.2 Kg xx mm
MAB17M-.50VX5FAA 8 mm 8 mm (Brake Hole 9 mm)
IP00 0.2 Kg
xx mm
MAB17M-.50V01FAA 6.35 mm 6.35 mm (Brake Hole 9 mm)
IP00 0.2 Kg xx mm
MAB17M-.50V16FAA 5 mm 5 mm (Brake Hole 9 mm)
IP00 0.2 Kg xx mm
All brakes with 300mm wire.
Pin 1 blue = 0 VDC, Pin 2 brown = +24 VDC, Pin 3 black = NC, Pin 4 white = NC.




JVL A/S Bregnerødvej 127 DK-3460 Birkerød Denmark
Tel: +45 4582 4440 Fax: +45 4582 5550 E-mail:
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