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Kerk Part # Nominal Rail Diameter Nominal Screw Diameter Inch Lead** Max. Drag Torque Life at 1/4 Design Load x 106 (Non Anti-Backlash) Torque to Move Load Design Load Screw Inertia per unit length Equiv. Diameter* CAD Model



oz.-in.
(Nm)
in.
(cm)
oz. in./lbs.
(NM/kg)
lbs.
(kg)
oz. in.sec.2/in.
(Kgm2/m)
in.
(mm)		  
SRA3005
 		3/8"
 		3/16"
 		.050
 		1.5
(0.014)		100 to 150
(250 to 380)		0.5
(0.007)		10
(5)		.1x10-5
(0.4x10-6)		.30
(7.6)		 Download
SRA3010
 		 
 		 
 		.100
 		2.0
(0.018)		 
 		1.0
(0.016)		    Download
SRA3025
 		 
 		 
 		.250
 		2.5
(0.020)		 
 		1.25
(0.019)		    Download
SRA3037
 		 
 		 
 		.375
 		3.0
(0.025		 
 		2.0
(0.030)		    Download
SRA4005
 		1/2"
 		1/4"
 		0.050
 		2.0
(0.015)		150 to 200
(380 to 500)		0.5
(0.007)		25
(10)		.3x10-5
(1.3x10-6)		0.39
(9.9)		 Download
SRA4025
 		 
 		 
 		0.250
 		3.0
(0.020)		 
 		1.5
(0.023)		    Download
SRA4050
 		 
 		 
 		0.500
 		4.0
(0.030)		 
 		2.5
(0.039)		    Download
SRA4100
 		 
 		 
 		1.000
 		5.0
(0.040)		 
 		4.5
(0.070)		    Download
SRA6010
 		3/4"
 		3/8"
 		0.100
 		3.0
(0.020)		180 to 280
(450 to 710)		1.0
(0.016)		50
(20)		1.5 x 10-5
(6.5X10-6)		0.60
(15.2)		 Download
SRA6020
 		 
 		 
 		0.200
 		4.0
(0.030)		 
 		1.5
(0.023)		    Download
SRA6050
 		 
 		 
 		0.500
 		5.0
(0.040)		 
 		2.5
(0.039)		    Download
SRA6100
 		 
 		 
 		1.000
 		6.0
(0.045)		 
 		4.5
(0.070)		    Download
SRA8010
 		1"
 		1/2"
 		0.100
 		4.0
(0.030)		280 to 320
(710 to 810)		1.0
(0.016)		100
(45)		5.2 x 10-5
(20X10-6)		0.81
(20.5)		 Download
SRA8020
 		 
 		 
 		0.200
 		5.0
(0.040)		 
 		1.5
(0.023)		    Download
SRA8050
 		 
 		 
 		0.500
 		6.0
(0.045)		 
 		2.5
(0.039)		    Download
SRA8100
 		 
 		 
 		1.000
 		8.0
(0.060)		 
 		4.5
(0.070)		    Download
SRZ3005
 		3/8"
 		3/16"
 		.050
 		2.0
(0.014)		50 to 80
(130 to 200)		.5
(0.007)		10
(5)		.1x10-5
(0.4x10-6)		.30
(7.6)		 Download
SRZ3010
 		 
 		 
 		.100
 		2.5
(0.018)		 
 		1.0
(0.016)		    Download
SRZ3025
 		 
 		 
 		.250
 		3.0
(0.020)		 
 		1.25
(0.019)		    Download
SRZ3037
 		 
 		 
 		.375
 		3.5
(0.025)		 
 		2.0
(0.030)		    Download
SRZ4005
 		1/2"
 		1/4"
 		0.050
 		3.0
(0.020)		75 to 100
(190 to 250)		0.5
(0.007)		25
(10)		.3x10-5
(1.3x10-6)		0.39
(9.9)		 Download
SRZ4025
 		 
 		 
 		0.250
 		4.0
(0.020)		 
 		1.5
(0.023)		    Download
SRZ4050
 		 
 		 
 		0.500
 		5.0
(0.030)		 
 		2.5
(0.039)		    Download
SRZ4100
 		 
 		 
 		1.000
 		6.0
(0.040)		 
 		4.5
(0.070)		    Download
SRZ6010
 		3/4"
 		3/8"
 		0.100
 		6.0
(0.045)		90 to 140
(230 to 350)		1.0
(0.016)		50
(20)		1.5 x 10-5
(6.5X10-6)		0.60
(15.2)		 Download
SRZ6020
 		 
 		 
 		0.200
 		6.5
(0.047)		 
 		1.5
(0.023)		    Download
SRZ6050
 		 
 		 
 		0.500
 		7.0
(0.050)		 
 		2.5
(0.039)		    Download
SRZ6100
 		 
 		 
 		1.000
 		7.5
(0.053)		 
 		4.5
(0.070)		    Download
SRZ8010
 		1"
 		1/2"
 		0.100
 		8.0
(0.057)		140 to 150
(350 to 410)		1.0
(0.016)		100
(45)		5.2 x 10-5
(20X10-6)		0.81
(20.5)		 Download
SRZ8020
 		 
 		 
 		0.200
 		8.5
(0.060)		 
 		1.5
(0.023)		    Download
SRZ8050
 		 
 		 
 		0.500
 		9.0
(0.064)		 
 		2.5
(0.039)		    Download
SRZ8100
 		 
 		 
 		1.000
 		9.5
(0.067)		 
 		4.5
(0.070)		    Download

* ScrewRail stiffness may be modeled using Classical Beam Deflection Theory with equivalent solid stainless steel beam of diameter given.
** Other leads available as custom orders.



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