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K Series Universal Rod Style Linear Actuator

K60 Performance Specs -

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K 60 Model
 Frame Size
mm (inch)
 Screw Lead mm (inch) Maximum Force
kN (lbf)		 Linear Speed at Max Rated RPM mm/sec (in/sec) Dynamic Load Rating kN (lbf) Life at Maximum Force1
km (in x 106)		 Maximum Input Torque4
Nm (lbf-in)		 Max Rated Input RPM
Roller Screw Models
KM60-xx05 60
(2.36)		 5
(0.1968)		 6.0
(1350)		 417
(16.4)		 7.67
(1725)		 10.4
(0.41)		 5.97
(52.8)		 5000
KM60-xx10 60
(2.36)		 10
(0.3937)		 3.0
(675)		 833
(32.8)		 6.78
(1525)		 115.3
(4.54)		 5.97
(52.8)		 5000

KX60-xx05

 60
(2.36)		 5
(0.1968)		 6.0
(1350)		 417
(16.4)		 12.18
(2738)		 41.7
(1.64)		 5.97
(52.8)		 5000

KX60-xx10

 60
(2.36)		 10
(0.3937)		 3.0
(675)		 833
(32.8)		 10.77
(2421)		 461.4
(18.17)		 5.97
(52.8)		 5000
Acme Screw Model2

KA60-01

 60
(2.36)		 2.54
(0.1)
 3.7
(830)
 56
(2.2)		 N/A N/A 5.97
(52.8)		 13303

KA60-02

 60
(2.36)		 5.08
(0.2)
 3.1
(700)
 146
(5.8)		 N/A N/A 5.97
(52.8)		 17253
1. The L10 expected life of a roller screw linear actuator is expressed as the linear travel distance that 90% of properly maintained roller screws manufactured are expected to meet or exceed.  For higher than 90% reliability, the result should be multiplied by the followinig factors: 95% x 0.62; 96% x 0.53; 97% x 0.44; 98% x 0.33; 99% x 0.21.  This is not a guarantee and these values should be used for estimation purposes only.  The formula that defines this value is: Travel Life in millions of mm, where: C = dynamic load rating (N); F = cubic mean applied load (N); S = Roller screw's lead.  L10 = (C/F)3 x S.
2. Acme screw life expectancy: As a result of the high friction inherent to acme screws, life expectancy is unpredictable.  Load, duty cycle, speed, temp, and lubrication all affect the amount of heat generated and thread wear by the acme nut which ultimately determines the life of the mechanism.  Acme screws typically have lower life expectancies than roller screws and should only be used in low duty cycle applications.
3. P x V for ACME screws should be kept below 0.1  P = Force/Max Force; V = Speed/max Speed
4. Input torque should be limited such that max force is not exceeded.  For a parallel belt ratio, the input torque ratings must be divided by the belt ratio for allowable motor torque.  The output force ratings remain the same.

KM60KX60KA60
Nominal Backlash mm (inch)
 0.2 (0.008) 0.1 (0.004) 0.356 (0.014)
Lead Accuracy µm/1000 mm (in/ft)
 G9: 200 (0.0024) G9: 200 (0.0024) N/A
Friction Torque Nm (lbf-in) 0.34 (3) 0.34 (3) N/A
Maximum Radial Load
 See Chart
Environmental Rating: Standard
 KM & KA IP54S / KX IP65S
Maximum Operating Temperature °C (°F)
 80°C (175° F)
Weights   kg (lbs)
Base Unit  - Zero Stroke  1.7 (3.7)
Adder per mm of Stroke  0.008 (0.017)
Adder for Inline (excluding motor)  0.42 (0.93)
Adder for Parallel Drive (excluding motor) 0.73 (1.6)
Adder for Front Flange 0.42 (0.93)
Adder for Front Flange with 1:1 Reduction
 0.54 (1.19)
Adder for Front Flange with 2:1 Reduction 2.16 (4.79)
Adder for Rear Clevis

0.44 (0.98)
Adder for Rear Eye

0.30 (0.67)
Adder for Front/Rear Angle Mounts

0.24 (0.54)
Adder for 2 Trunnions

0.37 (0.82)
Adder for Foot Mounts 0.45 (1)

 

 

 

K 60 Inertias
K60 Model5 mm Lead kg-m2 (lbf-in-sec2)Add per 25 mm, 5 mm Lead kg-m2 (lbf-in-sec2)
Base Unit - Input Drive Shaft Only 1.480 x 10-5 (1.31 x 10-4) 1.022 x 10-6 (9.045 x 10-6)
Inline Unit - w/Motor Coupling 2.702 x 10-5 (2.39 x 10-4)
1.022 x 10-6 (9.045 x 10-6)
1:1 Reduction Belt Drive (66 mm)
4.339 x 10-5 (3.84 x 10-4) 1.022 x 10-6 (9.045 x 10-6)
1:1 Reduction Belt Drive (86 mm) 7.378 x 10-5 (6.53 x 10-4) 1.022 x 10-6 (9.045 x 10-6)
1:1 Reduction Belt Drive (96 mm)
8.564 x 10-5 (7.58 x 10-4) 1.022 x 10-6 (9.045 x 10-6)
2:1 Reduction Belt Drive 96 mm)
7.095 x 10-5 (6.28 x 10-4)
2.555 x 10-7 (2.261 x 10-6)
 10 mm Lead kg-m2 (lbf-in-sec2)Add per 25mm, 10 mm Lead kg-m2 (lbf-in-sec2)
Base Unit - Input Drive Shaft Only 1.616 x 10-5 (1.43 x 10-4)
1.173x 10-6 (1.038 x 10-5)
Inline Unit - w/Motor Coupling
2.837 x 10-5 (2.51 x 10-4) 1.173x 10-6 (1.038 x 10-5)
1:1 Reduction Belt Drive (66 mm) 4.474 x 10-5 (3.96 x 10-4) 1.173x 10-6 (1.038 x 10-5)
1:1 Reduction Belt Drive 86 mm) 7.514 x 10-5 (6.65 x 10-4) 1.173x 10-6 (1.038 x 10-5)
1:1 Reduction Belt Drive (96 mm) 8.704 x 10-5 (7.70 x 10-4) 1.173x 10-6 (1.038 x 10-5)
2:1 Reduction Belt Drive (96 mm) 1.966 x 10-5 (1.74 x 10-4) 2.931 x 10-7 (2.595 x 10-6)

K75 Performance Specs -

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K 75 Model
 Frame Size
mm (inch)
 Screw Lead mm (inch) Maximum Force
kN (lbf)		 Linear Speed at Max Rated RPM mm/sec (in/sec) Dynamic Load Rating kN (lbf) Life at Maximum Force1
km (in x 106)		 Maximum Input Torque4
Nm (lbf-in)		 Max Rated Input RPM
Roller Screw Models
KM75-xx05 75
(2.95)		 5
(0.1968)		 11.1
(2500)		 333
(13.1)		 16.1
(3620)		 15.2
(0.6)		 11
(98)		 4000
KM75-xx10 75
(2.95)		 10
(0.3937)		 5.6
(1250)		 666
(26.2)		 13.5
(3036)		 143.3
(5.6)		 11
(98)		 4000

KX75-xx05

 75
(2.95)		 5
(0.1968)		 11.1
(2500)		 333
(13.1)		 25.6
(5746)		 60.7
(2.4)		 11
(98)		 4000

KX75-xx10

 75
(2.95)		 10
(0.3937)		 5.6
(1250)		 666
(26.2)		 21.4
(4820)		 573.3
(22.6)		 11
(98)		 4000
Acme Screw Model2, 3

KA75-01

 75
(2.95)		 2.54
(0.1)
 6.0
(1355)
 42
(1.7)		 N/A N/A 11
(98)		 1000

KA75-02

 75
(2.95)		 5.08
(0.2)
 5.1
(1139)
 110
(4.3)		 N/A N/A 11
(98)		 1300
1. The L10 expected life of a roller screw linear actuator is expressed as the linear travel distance that 90% of properly maintained roller screws manufactured are expected to meet or exceed.  For higher than 90% reliability, the result should be multiplied by the followinig factors: 95% x 0.62; 96% x 0.53; 97% x 0.44; 98% x 0.33; 99% x 0.21.  This is not a guarantee and these values should be used for estimation purposes only.  The formula that defines this value is: Travel Life in millions of mm, where: C = dynamic load rating (N); F = cubic mean applied load (N); S = Roller screw's lead.  L10 = (C/F)3 x S.
2. Acme screw life expectancy: As a result of the high friction inherent to acme screws, life expectancy is unpredictable.  Load, duty cycle, speed, temp, and lubrication all affect the amount of heat generated and thread wear by the acme nut which ultimately determines the life of the mechanism.  Acme screws typically have lower life expectancies than roller screws and should only be used in low duty cycle applications.
3. P x V for ACME screws should be kept below 0.1  P = Force/Max Force; V = Speed/max Speed
4. Input torque should be limited such that max force is not exceeded.  For a parallel belt ratio, the input torque ratings must be divided by the belt ratio for allowable motor torque.  The output force ratings remain the same.

KM75KX75KA75
Nominal Backlash mm (inch)
 0.2 (0.008) 0.1 (0.004) 0.356 (0.014)
Lead Accuracy µm/1000 mm (in/ft)
 G9: 200 (0.0024) G9: 200 (0.0024) N/A
Maximum Radial Load
 See Chart
Friction Torque Nm (lbf-in) 0.56 (5) 0.56 (5) N/A
Environmental Rating: Standard
 KM and KA IP54S / KS IP65S
Maximum Operating Temperature °C (°F)
 80°C (175° F)
Weights   kg (lbs)
Base Unit  - Zero Stroke  3.06 (6.75)
Adder per mm of Stroke  0.0107 (0.0235)
Adder for Inline (excluding motor)  1.12 (2.46)
Adder for Parallel Drive (excluding motor) 1.84 (4.06)
Adder for Front Flange 0.87 (1.91)
Adder for Front Flange with 1:1 Reduction
 1.13 (2.49)
Adder for Front Flange with 2:1 Reduction 0.84 (1.85)
Adder for Rear Clevis

0.84 (1.85)
Adder for Rear Eye

0.62 (1.37)
Adder for Front/Rear Angle Mounts

0.71 (1.56)
Adder for 2 Trunnions

1.12 (2.47)
Adder for Foot Mounts 0.45 (1)

 

 

K75 Inertias
K75 Model5 mm Lead kg-m2 (lbf-in-sec2)Add per 25 mm, 5 mm Lead kg-m2 (lbf-in-sec2)
Base Unit - Input Drive Shaft Only 9.26 x 10-5 (8.20 x 10-4) 3.13 x 10-6 (2.77 x 10-5)
Inline Unit - w/Motor Coupling 1.25 x 10-4 (1.11 x 10-3)
3.13 x 10-6 (2.77 x 10-5)
1:1 Reduction Belt Drive (86 mm)
2.29 x 10-4 (2.03 x 10-3) 3.13 x 10-6 (2.77 x 10-5)
1:1 Reduction Belt Drive (96 mm) 3.19 x 10-4 (2.82 x 10-3) 3.13 x 10-6 (2.77 x 10-5)
1:1 Reduction Belt Drive (130 mm)
5.96 x 10-4 (5.28 x 10-3) 3.13 x 10-6 (2.77 x 10-5)
2:1 Reduction Belt Drive 130 mm)
7.69 x 10-4 (6.80 x 10-3)
7.83 x 10-7 (6.93 x 10-6)
 10 mm Lead kg-m2 (lbf-in-sec2)Add per 25mm, 10 mm Lead kg-m2 (lbf-in-sec2)
Base Unit - Input Drive Shaft Only 9.48 x 10-5 (8.39 x 10-4)
3.32 x 10-6 (2.94 x 10-5)
Inline Unit - w/Motor Coupling
1.44 x 10-4 (1.28 x 10-3) 3.32 x 10-6 (2.94 x 10-5)
1:1 Reduction Belt Drive (86 mm) 2.31 x 10-4 (2.05 x 10-3) 3.32 x 10-6 (2.94 x 10-5)
1:1 Reduction Belt Drive 96 mm) 3.21 x 10-4 (2.84 x 10-3) 3.32 x 10-6 (2.94 x 10-5)
1:1 Reduction Belt Drive (130 mm) 5.98 x 10-4 (5.30 x 10-3) 3.32 x 10-6 (2.94 x 10-5)
2:1 Reduction Belt Drive (130 mm) 7.69 x 10-4 (6.81 x 10-3) 8.30 x 10-7 (7.36 x 10-6)

K90 Performance Specs -

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K 90 Model
 Frame Size
mm (inch)
 Screw Lead mm (inch) Maximum Force
kN (lbf)		 Linear Speed at Max Rated RPM mm/sec (in/sec) Dynamic Load Rating kN (lbf) Life at Maximum Force1 km (in x 106) Maximum Input Torque4   Nm (lbf-in) Max Rated Input RPM
Roller Screw Models
KM90-xx05 90
(3.54)		 5
(0.1968)		 15.6
(3500)		 250
(9.8)		 32.36
(7275)		 44.9
(1.77)		 15.5
(137)		 3000
KM90-xx10 90
(3.54)		 10
(0.3937)		 7.8
(1750)		 500
(19.7)		 30.02
(6750)		 573.8
(22.6)		 15.5
(137)		 3000

KX90-xx05

 90
(3.54)		 5
(0.1968)		 15.6
(3500)		 250
(9.8)		 51.37
(11548)		 179.6
(7.07)		 15.5
(137)		 3000

KX90-xx10

 90
(3.54)		 10
(0.3937)		 7.8
(1750)		 500
(19.7)		 47.66
(10715)		 2295
(90.4)		 15.5
(137)		 3000
Acme Screw Model2

KA90-01

 90
(3.54)		 2.54
(0.1)
 6.9
(1550)
 31
(1.2)		 N/A N/A 15.5
(137)		 7303

KA90-02

 90
(3.54)		 5.08
(0.2)
 5.8
(1300)
 73
(2.9)		 N/A N/A 15.5
(137)		 8603
1. The L10 expected life of a roller screw linear actuator is expressed as the linear travel distance that 90% of properly maintained roller screws manufactured are expected to meet or exceed.  For higher than 90% reliability, the result should be multiplied by the followinig factors: 95% x 0.62; 96% x 0.53; 97% x 0.44; 98% x 0.33; 99% x 0.21.  This is not a guarantee and these values should be used for estimation purposes only.  The formula that defines this value is: Travel Life in millions of mm, where: C = dynamic load rating (N); F = cubic mean applied load (N); S = Roller screw's lead.  L10 = (C/F)3 x S =
2. Acme screw life expectancy: As a result of the high friction inherent to acme screws, life expectancy is unpredictable.  Load, duty cycle, speed, temp, and lubrication all affect the amount of heat generated and thread wear by the acme nut which ultimately determines the life of the mechanism.  Acme screws typically have lower life expectancies than roller screws and should only be used in low duty cycle applications.
3. P x V for ACME screws should be kept below 0.1  P = Force/Max Force; V = Speed/max Speed
4. Input torque should be limited such that max force is not exceeded.  For a parallel belt ratio, the input torque ratings must be divided by the belt ratio for allowable motor torque.  The output force ratings remain the same.

KM90KX90KA90
Nominal Backlash mm (inch)
 0.2 (0.008) 0.1 (0.004) 0.356 (0.014)
Lead Accuracy µm/1000 mm (in/ft)
 G9: 200 (0.0024) G9: 200 (0.0024) N/A
Friction Torque Nm (lbf-in)  0.56 (5)
 0.56 (5)
 N/A
Maximum Radial Load
 See Chart
Environmental Rating: Standard
 KM & KA IP54S / KX IP65S
Maximum Operating Temperature °C (°F)
 80°C (175° F)
Weights   kg (lbs)
Base Unit  - Zero Stroke  5.42 (11.96)
Adder per mm of Stroke  0.016 (0.0366)
Adder for Inline (excluding motor)  0.51 (3.35)
Adder for Parallel Drive (excluding motor) 2.62 (5.80)
Adder for Front Flange 1.54 (3.40)
Adder for Front Flange with 1:1 Reduction
 2.16 (4.79)
Adder for Front Flange with 2:1 Reduction 2.86 (6.31)
Adder for Rear Clevis

1.45 (3.21)
Adder for Rear Eye

1.13 (2.494)
Adder for Front/Rear Angle Mounts

0.90 (1.97)
Adder for 2 Trunnions

0.80 (1.768)
Adder for Foot Mounts 1.71 (3.78)

 

 

K 90 Inertias
K90 Model5 mm Lead kg-m2 (lbf-in-sec2)Add per 25 mm, 5 mm Lead kg-m2 (lbf-in-sec2)
Base Unit - Input Drive Shaft Only 2.97 x 10-4 (2.63 x 10-3) 1.11 x 10-5 (9.80 x 10-5)
Inline Unit - w/Motor Coupling 3.84 x 10-4 (3.40 x 10-3)
1.11 x 10-5 (9.80 x 10-5)
1:1 Reduction Belt Drive (96 mm)
5.12 x 10-4 (4.53 x 10-3) 1.11 x 10-5 (9.80 x 10-5)
1:1 Reduction Belt Drive (130 mm) 7.98 x 10-4 (7.07 x 10-3) 1.11 x 10-5 (9.80 x 10-5)
2:1 Reduction Belt Drive 130 mm)
3.41 x 10-4 (3.02 x 10-3)
2.77 x 10-6 (2.45 x 10-5)
 10 mm Lead kg-m2 (lbf-in-sec2)Add per 25mm, 10 mm Lead kg-m2 (lbf-in-sec2)
Base Unit - Input Drive Shaft Only 3.00 x 10-4 (2.66 x 10-3)
1.13x 10-5 (1.00 x 10-4)
Inline Unit - w/Motor Coupling
3.87 x 10-4 (3.43 x 10-3) 1.13x 10-5 (1.00 x 10-4)
1:1 Reduction Belt Drive (96 mm) 5.15 x 10-4 (4.56 x 10-3) 1.13x 10-5 (1.00 x 10-4)
1:1 Reduction Belt Drive 130 mm) 8.02 x 10-4 (7.10 x 10-3) 1.13x 10-5 (1.00 x 10-4)
2:1 Reduction Belt Drive (130 mm) 3.42 x 10-4 (3.03 x 10-3) 2.82 x 10-6 (2.50 x 10-5)

Other Products

K Series

Electric Linear Actuators

Ex-202-exlar_kseries_400_normal

Now Available in 60, 75 and 90 mm Frame Sizes!

The K Series actuators from Exlar provide a truly universal solution for rod style actuator applications.  Now available in 60, 75 and 90 mm frame sizes, this series offers the option of two grades of planetary roller screws along with an option for an ACME screw.  These multiple grades of screw type allow you to select the configuration best suited to your application and budget. 

The K Series provides an ideal replacement for pneumatic cylinders, with dimensions and form factor consistent with ISO Metric pneumatic cylinder specifications.

The availability of high performance planetary roller screw drive allows the K Series to also replace hydraulic cylinders and provide a solution that offers superior life and performance to ball screw actuators.

Multiple Models to Fit your  Needs

Three product performance levels are available so you can choose which option best suits your application and budgetary requirements.

KX Series provides a high performance planetary roller screw for performance far superior to competing actuator technologies.  The KX is an ideal choice for demanding applications in industrial automation, mobile equipment, process control and others.

KM Series actuators employ a lower cost planetary roller screw design suited for applications that do not require the long life offered in the KX Series.  This option still provides twice the life of similarly sized ball screw actuators along with the efficiency and resistance to shock associated with roller screws.

KA Series actuators are constructed with an ACME screw for low duty cycle applications with 2.54 mm and 5.08 mm leads.  The KA Series can provide non-back driving solutions with a 2.54 mm lead.  The KA Series is an excellent choice for applications that position and hold a load, or need effective low duty cycle electro-mechanical motion.

K Series Features

  • Proven Exlar roller screw technology
  • Flexible mounting options
  • Adapts to various types of motors
  • Optional gear drives for high force output from lower motor torques

Universal Mounting Options

The K Series offers a wide variety of fixed and adjustable mounting accessories, consistent with NFPA inch and ISO Metric pneumatic cylinder standards.  Mounting options include:

  • Front flange
  • Rear flange
  • Rear clevis
  • Rear eye
  • Adjustable side trunnion
  • End angles
  • Foot mount

Standard Actuator Construction

The standard K Series actuator design provides an anodized aluminum housing offering a high level of corrosion resistance in many environments.  The standard main rod is plated steel with a stainless steel rod end insert, providing excellent wear characteristics.

Special Materials and Coatings

Exlar offers a variety of special materials and coating options for applications which require a higher level of corrosion-resistance.  The aluminum actuator body components can be manufactured with alternative coatings such as Type III hard coat anodizing, electroless nickel plating or epoxy coating.  The actuator's main rod can be provided in stainless steel construction.

Sealed Body Design

The standard body design of the K Series provides an IP54S sealed housing. IP65S sealing is available when allowable by the design of motor to be used.  This allows the actuators to be used in applications where water spray is present.

Motor Mounting Options

The K Series allows for complete flexibility in the type and style of motor to drive the actuator. Types of motors compatible with K Series actuators include DC motor, stepper and servo motors. The K Series can be ordered as a base unit without motor mounting allowing customers to manufacture their own mount.

For convenience these actuators are available with preconfigured motor mounts. Exlar maintains a large library of motor mounting dimensional information for most manufacturers’ servos and stepper motors.

The inline mount places the motor on the input end of the actuator and allows the most compact form factor. In addition, Exlar offers a clevis mount attached to the rear of the inline-mounted motor for rear mounting.

The parallel motor mounts (side mount) utilize a belt drive system to transmit the motor torque to the actuator input shaft. Belt reductions of 1:1 and 2:1 are offered allowing you to conveniently match the speed and output force to properly apply your K Series actuator to your specific application.

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