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The Posistop® X Class Oil Shear Motor and Coupler Brakes are designed and tested to operate over 6 million trouble free cycles with only occasional oil changes and no adjustment - ever! This unheard of life expectancy allows the Posistop® X Class Motor and Coupler Brakes to be used on applications previously thought impossible to do using a brake.

New Posistop® X Class Brakes let you eliminate the typical line stops, the frequent brake repairs and replacements. Here’s the reliability you need for today’s 24/7 manufacturing demands. Here’s speed and precision that can let you run at higher cycle rates and quality levels, or design new machines for higher performance.
Posistop X Class Brakes-3
Unit of Measure
Items Posistop X Class Brakes-3
XB1
XB1 Posistop® X Class Brake 		Posistop X Class Brakes-3
XB2
XB2 Posistop® X Class Brake 		Posistop X Class Brakes-3
XB3
XB3 Posistop® X Class Brake 		Posistop X Class Brakes
XB5
XB5 Posistop® X Class Brake 		Posistop X Class Brakes-3
XB6
XB6 Posistop® X Class Brake
Description N/A The Posistop® X Class Oil Shear Motor and Coupler Brakes are designed and tested to operate over 6 million trouble free cycles with only occasional oil changes and no adjustment - ever! This unheard of life expectancy allows the Posistop® X Class Motor and Coupler Brakes to be used on applications previously thought impossible to do using a brake.

New Posistop® X Class Brakes let you eliminate the typical line stops, the frequent brake repairs and replacements. Here’s the reliability you need for today’s 24/7 manufacturing demands. Here’s speed and precision that can let you run at higher cycle rates and quality levels, or design new machines for higher performance.
Thermal Rating N/A 21 HP Sec/Min N/A 39 HP Sec/Min N/A 42 HP Sec/Min N/A Consult Factory (CF) N/A Consult Factory (CF)
Maximum Kinatic Energy (KE) per Engagement N/A 7,530 ft·lb N/A 11295 ft·lb N/A 11295 ft·lb15,060 ft·lb18825 ft·lb N/A 29103 ft·lb36378 ft·lb43654 ft·lb50930 ft·lb N/A 29103 ft·lb36378 ft·lb43654 ft·lb50930 ft·lb
Piston Volume N/A 0.9 in³ N/A 0.9 in³ N/A 0.9 in³ N/A 3.92 in³ N/A 3.92 in³
Inertia WK2 N/A 0.0130 lb·ft² N/A 0.0130 lb·ft² N/A 0.0174 lb·ft²0.0181 lb·ft²0.0189 lb·ft² N/A 0.2011 lb·ft²0.2215 lb·ft² N/A 0.2011 lb·ft²0.2215 lb·ft²
Maximum Speed N/A 1800 rpm
Weight N/A 31 ft·lb N/A 31 ft·lb N/A 45 ft·lb N/A 140 ft·lb N/A 140 ft·lb
Oil Capacity N/A 28 Ounces N/A 28 Ounces N/A 30 Ounces N/A 110 Ounces N/A 110 Ounces
Overall Dimensions AA N/A 3.51 in N/A 3.51 in N/A 4.44 in N/A 5.00 in N/A 5.50 in
Overall Dimensions AB N/A 3.77 in N/A 3.77 in N/A 4.44 in N/A 5.00 in N/A 5.50 in
Overall Dimensions AG N/A 7.00 in N/A 7.00 in N/A 8.46 in N/A 11.45 in N/A 11.45 in
Overall Dimensions F N/A 3.44 in N/A 3.44 in N/A 4.44 in N/A 5.50 in N/A 5.50 in
Overall Dimensions G N/A 4.50 in N/A 4.50 in N/A 5.08 in N/A 6.64 in N/A 6.64 in
Overall Dimensions P N/A NPT 1/8 in N/A NPT 1/8 in N/A NPT 1/8 in N/A NPT 1/4 in N/A NPT 1/4 in
Overall Dimensions Q N/A 4.94 in N/A 4.94 in N/A 4.94 in N/A N/A
Input Dimensions AL N/A 0.63 in N/A 0.63 in N/A 0.57 in N/A 0.71 in N/A 0.71 in
Input Dimensions BE N/A 0.50 in N/A 0.50 in N/A 0.73 in N/A 0.69 in N/A 0.69 in
Input Dimensions E N/A 0.28 in N/A 0.28 in N/A 0.19 in N/A N/A
Input Dimensions FAH N/A 2.38 in N/A 2.38 in N/A 2.94 in N/A 3.88 in N/A 4.88 in
Input Dimensions FAJ N/A 5.88 in N/A 5.88 in N/A 7.250 in N/A 7.250 in N/A 9.00 in
Input Dimensions FAK N/A 4.502 in N/A 4.500 in N/A 8.502 in N/A N/A
Input Dimensions FU N/A 0.625 in N/A 0.875 in N/A 1.125 in N/A N/A
Input Dimensions FBF N/A 7/16 in N/A 7/16 in N/A 9/16 in N/A 9/16 in N/A 9/16 in
Output Dimensions a N/A 3/16 x 3/32 in N/A 3/16 x 3/32 in N/A 1/4 x 1/8 in N/A 1/4 x 1/8 in N/A 5/16 x 5/32 3/8 x 3/16 in
Output Dimensions AH N/A 2.06 in N/A 2.12 in N/A 2.63 in N/A 2.75 in3.12 in3.75 in N/A 4.37 in4.62 in
Output Dimensions AJ N/A 5.875 in N/A 5.875 in N/A 7.250 in N/A 7.250 in N/A 9.000 in
Output Dimensions AK N/A 4.500 in N/A 4.500 in N/A 8.500 in N/A 8.500 in N/A 10.50 in
Output Dimensions BB N/A 0.16 in N/A 0.16 in N/A 0.25 in N/A 0.25 in N/A 0.25 in
Output Dimensions BF N/A 3/8-16 in N/A 3/8-16 in N/A 1/2-13 in N/A 1/2-13 in N/A 1/2-13 in
Output Dimensions U N/A 0.625 in0.875 in N/A 0.625 in0.875 in N/A 1.125 in N/A 1.125 in1.375 in1-5/8 in N/A 1-5/8 in1-7/8 in
Output Dimensions XD N/A 1.50 in1.73 in N/A 1.50 in1.73 in N/A 2.00 in N/A 2.65 in3.00 in3.63 in N/A 3.62 in3.69 in
Dimensions AA N/A 3.51 in N/A 3.51 in N/A 4.44 in N/A 5.50 in N/A 5.50 in
Dimensions AB N/A 3.77 in N/A 3.77 in N/A 4.44 in N/A 5.50 in N/A 5.50 in
Dimensions AG N/A 7.00 in N/A 7.00 in N/A 8.46 in N/A 11.70 in N/A 11.70 in
Dimensions AL N/A 0.63 in N/A 0.63 in N/A 0.57 in N/A 0.71 in N/A 0.71 in
Dimensions BE N/A 0.50 in N/A 0.50 in N/A 0.56 in N/A 0.69 in N/A 0.69 in
Dimensions E N/A 0.28 in N/A 0.28 in N/A 0.73 in N/A N/A
Dimensions F N/A 3.44 in N/A 3.44 in N/A 4.44 in N/A 5.50 in N/A 5.50 in
Dimensions G N/A 4.50 in N/A 4.50 in N/A 4.50 in N/A 6.64 in N/A 6.64 in
Dimensions FAH N/A 2.38 in N/A 2.38 in N/A 2.94 in N/A 3.88 in N/A 4.88 in
Dimensions FAK N/A 4.50 in N/A 4.50 in N/A 8.50 in N/A N/A
Dimensions FU N/A 5/8 in N/A 7/8 in N/A 7/8 in1-1/8 in N/A 1-1/8 in1-3/8 in1-5/8 in N/A 1-5/8 in1-7/8 in
Dimensions a N/A 3/16 x 3/32 in N/A 3/16 x 3/32 in N/A 1/4 x 1/8 in N/A 1/4 x 1/8 in3/8 x 3/16 in5/16 x 5/32 in N/A 1/2 x 1/4 in3/8 x 3/16 in
Dimensions FBF N/A 7/16 in N/A 7/16 in N/A 9/16 in N/A 9/16 in N/A 9/16 in
Dimensions FAJ N/A 5.875 in N/A 5.875 in N/A 7.250 in N/A 7.250 in N/A 9.000 in
Dimensions P N/A NPT 1/8 in N/A NPT 1/8 in N/A NPT 1/8 in N/A NPT 1/4 in N/A NPT 1/4 in
Dimensions Q N/A 4.94 in N/A 4.94 in N/A 4.94 in N/A N/A
Note N/A N/A N/A N/A Available Input Bores XB5: 1-1/8, 1-3/8 & 1-5/8
XB6: 1-5/8 & 1-7/8 		N/A Available Input Bores XB5: 1-1/8, 1-3/8 & 1-5/8
XB6: 1-5/8 & 1-7/8