Page 9 - Exlar - K series medium force roller screw actuator

K Series Linear Actuators

Estimated Service Life

KM60 KM60 10 mm (6.23) KX60 KX60 10 mm

1400
1200
Cubic Mean Load - Lbs (kN) (3.56) KM60 5 mm Cubic Mean Load - Lbs (kN) (4.45) KX60 5 mm
(5.34)
1200
1000
(5.34)
(4.45)
1000
800
800
(3.56)
600
(2.67)
600
(2.67)
400
(1.78)
400
(1.78)
200
200
(.89)
0
1 10 100 1,000 10,000 100,000 1,000,000 10,000,000 (.89) 0 1 10 100 1,000 10,000 100,000 1,000,000 10,000,000
(25.4) (254) (2540) (25,400) (25,4000) (2,540,000) (25,400,000) (254,000,000) (25.4) (254) (2540) (25,400) (25,4000) (2,540,000) (25,400,000) (254,000,000)

Travel Life - Millions of Inches (mm) Travel Life - Millions of Inches (mm)
KM75 KM75 10 mm (11.12) KX75
Cubic Mean Load - Lbs (kN) (8.89) KM75 5 mm Cubic Mean Load - Lbs (kN) (8.89) KX75 10 mm
2500
2500
(11.12)
2000
2000
KX75 5 mm
1500
1500
(6.67)
(6.67)
1000
1000
(4.45)
(4.45)
500
500
(2.22)
0
1 10 100 1,000 10,000 100,000 1,000,000 10,000,000 (2.22) 0 1 10 100 1,000 10,000 100,000 1,000,000 10,000,000
(25.4) (254) (2540) (25,400) (25,4000) (2,540,000) (25,400,000) (254,000,000) (25.4) (254) (2540) (25,400) (25,4000) (2,540,000) (25,400,000) (254,000,000)
Travel Life - Millions of Inches (mm) Travel Life - Millions of Inches (mm)

KM90 KM90 10 mm (17.79) KX90 K Series
4000
Cubic Mean Load - Lbs (kN) (13.35) KM90 5 mm Cubic Mean Load - Lbs (kN) (13.35) KX90 10 mm
4000
(17.79)
3500
3500
(15.57)
(15.57)
3000
3000
KX90 5 mm
2500
2500
(11.12)
(11.12)
2000
2000
(8.89)
(8.89)
1500
1500
(6.67)
(6.67)
1000
1000
(4.45)
500
500
(2.22)
(2.22)
0
1 10 100 1,000 10,000 100,000 1,000,000 10,000,000 (4.45) 0 10 10,000
100,000
100
10,000,000
1,000
1,000,000
(25.4) (254) (2540) (25,400) (25,4000) (2,540,000) (25,400,000) (254,000,000) (25.4) 1 (254) (2540) (25,400) (25,4000) (2,540,000) (25,400,000) (254,000,000)
Travel Life - Millions of Inches (mm) Travel Life - Millions of Inches (mm)

Service Life Estimate Assumptions:
• Sufficient quality and quantity of lubrication is maintained throughout The L expected life of a roller screw linear actuator is

10
service life (please refer to engineering reference on page 212 for expressed as the linear travel distance that 90% of
lubrication interval estimates.)
• Bearing and screw temperature between 20° C and 40° C properly maintained roller screws manufactured are
• No mechanical hard stops (external or internal) or impact loads expected to meet or exceed. This is not a guarantee and
• No external side loads these charts should be used for estimation purposes only.
• Does not apply to short stroke, high frequency applications such as fatigue
testing or short stroke, high force applications such as pressing. (For
information on calculating The underlying formula that defines this value is:
estimating life for unique applications please refer to the engineering Travel life in millions of inches, where:
reference on page 212.
C = Dynamic load rating (lbf) 10 ( ) 3
C

a
F = Cubic mean applied load (lbf) L = F a x ℓ
cml

ℓ = Roller screw lead (inches) cml
For additional details on calculating estimated service life,
please refer to the Engineering Reference, page 212.
952.500.6200 | www.exlar.com 147