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Multiple Disc Air / Pneumatic Brakes (AHA)

aha-hydraulic-clutch

Carlyle Johnson's AHA model multiple disc spring set air / hydraulic / pneumatic brakes deliver more than ten times the torque of single disc pneumatic brakes of the same actuation and package size.

Featuring our patented floating disc principle, separator springs are utilized between brake discs, assuring fast disengagement with minimal drag, and minimal resultant heat when in neutral. Hardened steel inner friction discs are splined to the body for proper lug-load distribution. These discs operate against bronze-faced steel outer discs, providing long wear and smooth operation.

Our engineering department is available to assist you with your multiple disc air / hydraulic brake component. CJM can modify our standard AHA model pneumatic brakes to meet your needs, or custom design and manufacture a multiple disc brake to your exact specifications and operating requirements.

Specifications / Dimensions

*Torque at 60 PSIG. Model refers to air clutch number.
**Measured at 1800 RPM. B10 Bearing Life means that there is a 10% chance of bearing failure at the end of the stated period of time.
Model Static Torque* (ft. lbs.) Dynamic Torque* (ft. lbs.) B10 Bearing Life**(hours) A B Std. Bore
AHA-0015999 30 15 10,000 3.500 3.34375 3/4 or 7/8
AHA-0025999 70 35 5,600 4.000 3.6250 1 or 1 1/8
AHA-0050999 100 50 5,600 4.500 3.9375 1 1/4 or 1 3/8
AHA-0100999 150 75 12,000 4.875 4.21875 1 1/2 or 1 5/8
AHA-0200999 250 125 5,600 5.750 4.6250 1 3/4 or 1 7/8
AHA-0400999 600 300 8,000 7.000 5.53125 2 or 2 1/4
AHA-0800999 1,200+ 600+ 8,000+ 9.500 6.37500 2 3/4 or 3
*Torque at 60 PSIG. St = Static. Dyn = Dynamic. Model refers to air clutch number.
**Measured at 1800 RPM. B10 Bearing Life means that there is a 10% chance of bearing failure at the end of the stated period of time.
Model Keyway C D G NPT
AHA-0015999 3/16 x 3/32 3.5000 .62500 .9375 .12500
AHA-0025999 3/16 x 3/32 4.1875 .68750 .06250 .12500
AHA-0050999 1/4 x 1/8 4.6875 .68750 .06250 .12500
AHA-0100999 5/16 x 5/32 5.1875 .87500 .18750 .12500
AHA-0200999 3/8 x 3/16 6.7500 .81250 .18750 .25000
AHA-0400999 7/16 x 7/32 8.500 1.09375 .12500 .25000
AHA-0800999 9/16 x 7/32 10.0000 1.18750 .18750 .25000
Internal Flange
Part # Used With* A B.C.
B		 Screw Size Holes Pilot Dia.
C		 D E F Slots
EMA-00325 106-300 AHA-0015999 3.562 - 3.560 2.567 - 2.557 1/4 3 1.877 - 1.875 3.5000 1.0625 .1875 8
AHA-0025 106-300 AHA-0025999 4.250 - 4.248 3.067 - 3.057 1/4 3 2.377 - 2.375 4.1875 1.2500 .1875 8
EMA-0425 106-300 AHA-0050999 4.750 - 4.748 3.630 - 3.620 1/4 3 2.517 - 2.515 4.6875 1.2500 .1875 8
EMA-0475 106-300 AHA-0100999 5.250 - 5.248 3.942 - 3.932 5/16 3 2.517 - 2.515 5.1875 1.3750 .2500 8
EMA-0625 106-300 AHA-0200999 6.812 - 6.810 5.317 - 5.307 3/8 4 3.767 - 3.765 6.7500 1.6562 .3125 8
AHA-0400 106-300 AHA-0400999 8.562 - 8.560 6.255 - 6.245 1/2 4 4.877 - 4.875 8.5000 1.9375 .3125 12
AHA-0800 106-300 AHA-0800999 10.062 - 10.060 8.067 - 8.057 3/8 6 5.517 - 5.515 10.0000 2.0625 .3125 12

*"Used with" refers to brake number.

External Flange
Part # Used With* A B.C.
B		 Screw Size Holes Pilot Dia.
C		 D E F Slots
EMA-00325 106-200 AHA-0015999 4.625 - 4.623 4.130 - 4.120 1/4 3 3.300 - 3.298 3.5000 1.0625 .2500 8
AHA-0025 106-200 AHA-0025999 5.625 - 5.623 4.880 - 4.870 1/4 3 3.814 - 3.812 4.1875 1.1875 .2500 8
EMA-0425 106-200 AHA-0050999 6.125 - 6.123 5.380 - 5.370 1/4 4 4.314 - 4.312 4.6875 1.2500 .2500 8
EMA-0475 106-200 AHA-0100999 6.875 - 6.873 6.005 - 5.995 5/16 4 4.814 - 4.812 5.1875 1.3750 .2500 8
EMA-0625 106-200 AHA-0200999 8.500 - 8.498 7.692 - 7.682 3/8 4 6.377 - 6.375 6.7500 1.6562 .3125 8
AHA-0400 106-200 AHA-0400999 10.625 - 10.623 9.630 - 9.620 1/2 4 8.095 - 8.093 8.5000 1.9375 .3125 12
AHA-0800 106-200 AHA-0800999 12.250 - 12.248 11.130 - 11.120 3/8 6 9.533 - 9.531 10.0000 2.0625 .3125 12
 

In addition to our standard Multiple Disc Air / Pneumatic Brakes (AHA, our engineering department can custom design and manufacture a new component to meet your specific requirements. If you have further questions or would like to discuss your specific needs, please contact us.

Images & Drawings

aha-hydraulic-clutch-dimensions
aha-hydraulic-clutch-flanges

Features of AHA Pneumatic Brakes

CJM's multiple disc air / hydraulic pneumatic brakes are produced with a minimum of moving parts, which allows for quick and simple installation. A stationary cylinder assembly is mounted on deep-groove ball bearings to accommodate thrust loads, with quad-ring seals that assure maximum performance without leaking air or hydraulic fluid. Ample-sized ports and passages also provide fast piston action.

AHA model pneumatic brakes can be operated either dry or in oil. For wet applications (including oil mist, spray, splash or bath) the brake should be ordered without bearing shields. For dry applications AHA models are typically furnished with permanently lubricated ball bearings.

Advantages

  • Highest torque in the smallest space
  • Long life floating discs for low heat and extremely low neutral drag
  • No special tools required for repair or installation of component
  • Self-adjusting for wear

Operation

  • Torque range 30 lb. ft.- 1,200 lb. ft.
  • Wet or dry application
  • Automatic wear compensation
  • Stationary cylinder assembly
  • No levers, cams, or highly stressed parts

Customization

  • Custom designs and alterations available

Downloads

product-paper-tech-paper-ringfeder-locking-assemblies-en-11-2022

AHA Brake Specification Sheet
installation-and-operations-manual-ringfeder-locking-assemblies-rfn-7006-en-08-2019

Upload a CAD for a custom mulitple disc pneumatic brake design.

Further downloads including certificates, instruction manuals and product images are available to you in our Download Center:

Downloads