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  • Power Cylinder

U Series Power Cylinder

The smaller, lighter U Series Power Cylinder with more than 6 tons rated thrust

Power cylinder that succeeds in providing a smaller, lighter unit with better cost performance while maintaining the same performance of the previous model (T series).

A new model with 50 tons rated thrust was launched on January 1, 2020.

U Series Power Cylinder
Rated thrust
58.8 to 490kN {6000 to 50000kgf}
6.5 to 52mm/s

1. Features of U Series Power Cylinders

Lightweight and compact

Thanks to newly developed special ball screws and bearings, we succeeded in reducing the total length by a max. of 11% and the mass 40% compared with the previous model (T series). The smaller size and lighter weight makes it easy to replace hydraulic cylinders.

Complete line-up available

We added a new model with 50 tons rated thrust, which makes it easy to replace large hydraulic cylinders with a 250 mm inner diameter.

Better cost performance
In addition to achieving cost reductions compared to previous models thanks to smaller and lighter parts, the power cylinder is electrical so it has much better power savings than hydraulic types, greatly reducing power consumption.

Comparison of power consumption with hydraulic cylinders

Annual power consumption comparison per unit (kWh/year)

2. Two types of safety mechanisms for U Series Power Cylinders

Two types are available, depending on the safety mechanism

B type (with wet slip clutch)

A wet slip clutch is built in at the end of the reducer screw shaft. The use of a special lining provides protection during overloads.

U Series Power Cylinder B type structural diagram

C type (with thrust detection unit )

A thrust detection spring unit is built in to the bracket. It is effective during push/pull stopping or when electrical signals are required during overloads.

U Series Power Cylinder C type structural diagram

The 50 ton type with thrust detection unit cannot be regularly used for push/pull stops. Use this type as a safety device.

3. Model Numbering Example

LP U B 6000 L 5 V T1 LCJ
(1) (2) (3) (4) (5) (6) (7) (8) (9)
  1. (1) Power Cylinder
  2. (2) U series
  3. (3) Type: B = wet slip clutch, C= with thrust detection unit
  4. (4) Rated thrust
  5. (5) Speed: S, L, M, H
  6. (6) Nominal stroke
  7. (7) Voltage
  8. (8) Motor option
  9. (9) Option code

Rated thrust

6000 58.8kN {6000kgf}
8000 78.4kN {8000kgf}
12000 117kN {12000kgf}
16000 156kN {16000kgf}
22000 215kN {22000kgf}
32000 313kN {32000kgf}
50000 490kN {50000kgf}

Nominal stroke

5 500mm
10 1000mm
15 1500mm
20 2000mm


No code 200V class 200/200/220V, 50/60/60Hz
V 400V class 400/400/440V, 50/60/60Hz
V1 380V/50Hz
V2 380V/60Hz
V3 415V/50Hz
V4 460V/60Hz

Option code

L With two external limit switches for stroke adjustment*1
L3 With three external limit switches for stroke adjustment*2
K2,K4 Position detecting internal limit switch*3
P Potentiometer*3
R Rotary encoder*3
C Clevis*3
J Bellows*4
  • 1. This cylinder may be damaged during overstrokes. At minimum, we recommend attaching this OP (for position control).
  • 2. Please specify 4 or more mountings separately.
  • 3. Cannot combine with clevises and K2, K4, P, and R.
  • 4. The stroke is the same.

List of motor options

Code Specification Notes
T1 Heat resistance class F40°C Upgraded series with motor heat resistance class F (for brake, heat resistance class B)
T2 Heat resistance class F60°C Series with motor heat resistance class F and usable up to 60ºC (for brake, heat resistance class B)
T3 Heat resistance class F80°C Series with motor heat resistance class F and usable up to 80ºC (for brake, heat resistance class B)
T4 Heat resistance class H80°C Series with motor heat resistance class H and usable up to 80ºC (for brake, heat resistance class B)
Z Inverter series/200V Designed for brake motors for inverter drives and a power supply voltage of 200V class.
ZV Inverter series/400V Designed for brake motors for inverter drives and a power supply voltage of 400V class.
D Explosion-proof series d2G4 explosion-proof standards (External limit switches for stroke adjustment are also available in explosion-proof specifications as a made-to-order item.)
N CE compliant Brake motor with CE marking conforming to European EC Directive
N2 UL compliant Brake motor with UL marking conforming to American UL standards
N3 CCC compliant Brake motor with CCC marking conforming to Chinese CCC system
W IP56 series Only brake motor is IP56 compatible (dust-resistant and water-resistant).
The standard operating environment as a Power Cylinder unit is the same as that of standard products.
H Special treatment for tropical climes Brake motor that prevents insulation degradation from condensation caused when transporting products across the equator by ship.
E IE3 series Standard brake motors are not eligible for the Top Runner Program, but we will meet customer needs for the IE3 series.

4. Standard model list

Type Rated thrust
Nominal speed
Motor capacity
Rod travel per manual shaft revolution
rod torque
Nominal stroke
S 58.8k (33.3k)
6000} ({3400})
6.5/7.8 0.75 1.0 124
500, 1000
*1500 (Rated thrust: 33.3kN)
L 18/22 1.5 0.7
M 26/31 2.2 1.0
H 42/50 3.7 1.7
S 78.4k
10/12 1.5 1.2 166
500, 1000, 1500
L 20/24 2.2 0.8
M 30/36 3.7 1.2
H 43/52 5.5 1.7
L 117k (68.6k)
12000} ({7000})
10/12 2.2 1.2 333
500, 1000, 1500
*2000 (Rated thrust: 68.6kN)
M 18/22 3.7 2.2
H 30/36 5.5 1.2
L 156k
14.5/17.5 3.7 1.7 444
500, 1000, 1500, 2000
M 20/24 5.5 2.3
H 30/36 7.5 1.2
L 215k
14.5/17.5 5.5 2.9 915
500, 1000, 1500, 2000
M 20/24 7.5 3.2
H 30/35 11 3.5
L 313k
10/12 5.5 2.1 1109
500, 1000, 1500, 2000
M 15/18 7.5 2.4
H 20/24 11 2.4
L 490k
8/10 7.5 0.3 2166
500, 1000, 1500, 2000
M 12/14 11 0.5
H 16/19 15 0.6

Other thrust models are available. Contact a Tsubaki representative for more information.

When replacing the T series

U Series N type models compatible with the T Series mounting dimensions are available. Since the N type more than triples the expected travel distance of the ball screw over previous models, it contributes to reduced cylinder replacement frequency.

Model Numbering Example: LPUB6000LN5VT1LPCUJ-TK

■ N: N type (For replacement of the T series) ■ Please add "TK" to the end of the model number.