Spring Engaged Brakes – NEMA Frame
SPRING AND AIR ENGAGED FRICTION BRAKES
Pneumatic friction brakes from Mach III provide simple solutions for stopping and holding.
Spring engaged brakes remain engaged in the absence of air pressure. They are often referred to as power-off brakes, fail-safe brakes or holding brakes. These brakes are best suited for applications where they are used to prevent rotary motion of a load and are not suitable for dynamic stopping.
Air engaged brakes are applied with compressed air and release in the absence of air pressure. They are often referred to as power-on brakes. These brakes are best suited for bringing a load to a stop and preventing rotary motion of a load.
SPRING ENGAGED BRAKES – NEMA FRAME
C-Face Mounted Friction Brakes for Power Off Holding
Function: Holding, Failsafe (Non-Cycling Applications)
Drive Arrangement: Motor to Gear Reducer (Gear Box)
- Spring pressure compresses drive and friction discs to produce a fixed amount of torque.
- Air pressure is applied to disengage the brake.
Operation
Spring pressure compresses drive and friction discs to produce a fixed amount of torque.
The brake is released when energized with sufficient air pressure (see table below).
Mounting
Brake is designed to mount between a c-face motor and gear reducer.
Not suitable for belt or chain drive (pulley or sprocket output) configurations.
Brake is designed for horizontal mounting. If vertical mounting is required, consult engineering.
Applications
Spring engaged brakes are designed for holding applications.
Maximum RPM varies by model and is listed on the PDF detail sheet (see table below). Consult engineering if the intended application exceeds the listed maximum RPM.
Design Features
Models listed have enclosed, aluminum housings.
Clear anodized and stainless housing versions are also available. Contact engineering for details.
|
Product Code |
Torque |
Brake Release Pressure |
NEMA Frame Size |
Output Shaft & Input Bore |
Detail Sheet |
|
D2C2R-42H |
73 lb-in |
60-65 PSI |
42C |
0.375 in |
|
|
D2C2R-48H |
73 lb-in |
60-65 PSI |
48C |
0.500 in |
|
|
D3C2F-34H |
59 lb-in |
60-65 PSI |
34C |
0.500 in |
|
|
D3C3R-56H |
222 lb-in |
60-65 PSI |
56C |
0.625 in |
|
|
D3C3R-14H |
222 lb-in |
60-65 PSI |
143TC, 145TC |
0.875 in |
|
|
D5C3R-18H |
985 lb-in |
60-65 PSI |
182TC, 184TC |
1.125 in |
|
|
D5C3R-21H |
985 lb-in |
60-65 PSI |
213TC, 215TC |
1.375 in |
|
|
D8C2K-28H |
2,367 lb-in |
70-75 PSI |
284TC, 286TC |
1.875 in |
