Cryogenic Environment Solutions
01
KVM Series Stepper Motors | Designed for Cryogenic, Radiation & Extreme Environments
Vacuum · Cryogenic · High-temperature · Radiation
Key Features
● Stepper motors for operations in vacuum, cryogenic, high temperature and radiation applications
● Vacuum: up to 10-7Pa
● Operating temperature: down to -196℃ , up to 200℃
● Radiation resistance: up to 106Gy
● Motor Flange: 28/42/57/86mm ( Nema 11/17/23/34）
● Holding torque: 0.04 to 4.4Nm
● Basic step angle: 1.8° with accuracy of 5%
● Lubrication: grease or dry lubrication
● Optional: resolver feedback, safe brake, double shaft, modified shaft
Options
● Safe brake
● Resolver feedback
● Screw output shaft
● Handwheel
● Rear shaft
Applications
● Biomedical
● Semiconductor manufacturing
● 3C manufacturing
● Scientific Instruments
● in-vacuum equipment
● Nuclear energy
● Military and Aerospace
● automative parts testing
● General Automation
① Product series
KVM series stepper motors
② Flange size
28/42/57/86mm
③ Motor length
32/51/48/60/70/86/128mm
④ Output shaft
D = single shaft
SZ = double shaft
Blank = without brake
B = with brake
Blank = without feedback
**R = with resolver feedback
⑦ Environmental temperature ratings
| Environmental temperature rating code | Temperature range (℃) |
Vacuum class |
Radiation resistance (Gy，optional) |
| RHT | -20~+200 | 10-3 | 106 |
| SHT | -20~+200 | 10-3/10-5/10-7 | - |
| HT | -20~+150 | 10-3/10-5/10-7 | - |
| NTL1 | -40~+85 | 10-1 | - |
| NTL2 | -60~+120 | 10-3/10-5 | - |
| NTL3 | -65~+125 | 10-3 | - |
| NTL4 | -80~+40 | 10-3 | - |
| NTL5 | -60~+150 | - | - |
| LT | -100~+40 | 10-3 | - |
| SLT | -196~+40 (Non-condensing) |
10-3/10-5/10-7 | - |
| L*H* | customized | customized | customized |
⑧ Vacuum class
⑨ Radiation resistance code
Blank = Non-vacuum
V3 = Low pressure or vacuum to 10-3Pa
V5 = Vacuum to 10-5Pa
V7 = Vacuum to 10-7Pa
Blank = No radiation resistance
RH = Radiation resistance (total dose 106Gy)
*It is not possible to install both brake and position feedback devices on one single motor.
**Kingsni can provide signal converter to convert resolver signals to RS485 output or A/B incremental pulse output.
Technical Specifications
KVM2832：flange 28mm, length 32mm, holding torque 0.04Nm
| model number | motor length (mm) |
current (RMS,A) |
resistance (Ω) |
inductance (mH) |
holding torque (N.m) |
rotor inertia (g.cm²) |
mass (Kg) |
motor wiring |
| KVM2832 | 32 | 0.4 | 4.6 | 3.41 | 0.04 | 8 | 0.15 | 4 flying leads |
* For vacuum environment applications, when the motor runs continuously at a speed below 50rpm, the drive current should be reduced to 80% of the values listed in the table above to prevent the motor from overheating.
Dimension Drawings
Torque-speed curve
Specifications
KVM2851: flange 28mm, length 51mm, holding torque 0.1Nm
| model number | motor length (mm) |
current (RMS,A) |
resistance (Ω) |
inductance (mH) |
holding torque (N.m) |
rotor inertia (g.cm²) |
mass (Kg) |
motor wiring |
| KVM2851 | 51 | 0.5 | 7.49 | 7.62 | 0.10 | 19 | 0.24 | 4 flying leads |
* For vacuum environment applications, when the motor runs continuously at a speed below 50rpm, the drive current should be reduced to 80% of the values listed in the table above to prevent the motor from overheating.
Dimension Drawings
Torque-speed curve
Specifications
KVM4248: flange 42mm, length 48mm, holding torque 0.4Nm
| model number | motor length (mm) |
current (RMS,A) |
resistance (Ω) |
inductance (mH) |
holding torque (N.m) |
rotor inertia (g.cm²) |
mass (Kg) |
cable diameter (mm) |
| KVM4248 | 48 | 1.1 | 1.84 | 3.05 | 0.40 | 76 | 0.51 | 4.5 |
* For vacuum environment applications, when the motor runs continuously at a speed below 50rpm, the drive current should be reduced to 80% of the values listed in the table above to prevent the motor from overheating.
Dimension Drawings
Torque-speed curve
Specifications
KVM4260: flange 42mm, length 60mm, holding torque 0.5Nm( in vacuum) or 0.58Nm(non-vacuum)
| model number | motor length (mm) |
current (RMS,A) |
resistance (Ω) |
inductance (mH) |
holding torque (N.m) |
rotor inertia (g.cm²) |
mass (Kg) |
cable diameter (mm) |
| KVM4260 non-vacuum environments | 60 | 1.4 | 2.31 | 4.45 | 0.58 | 108 | 0.63 | 4.5 |
| KVM4260 vacuum environments | 60 | 1.1 | 2.31 | 4.45 | 0.5 | 108 | 0.63 | 4.5 |
* For vacuum environment applications, when the motor runs continuously at a speed below 50rpm, the drive current should be reduced to 80% of the values listed in the table above to prevent the motor from overheating.
Dimension Drawings
L： length adder, 38mm for brake, 20mm for resolver feedback
Please contact us for dimension drawings of rear shaft, screw output shaft and handwheel options.
Please contact us for dimension drawings of rear shaft, screw output shaft and handwheel options.
Torque-speed curve
Torque-speed curve
（drive phase current 1.4Arms, non-vacuum environment）
Torque-speed curve
（drive phase current 1.1Arms, vacuum environment）
Specifications
KVM5770：flange 57mm, length 70mm, holding torque 0.8Nm( in vacuum) or 0.97Nm(non-vacuum)
| model number | motor length (mm) |
current (RMS,A) |
resistance (Ω) |
inductance (mH) |
holding torque (N.m) |
rotor inertia (g.cm²) |
mass (Kg) |
cable diameter (mm) |
| KVM5770 non-vacuum environments | 70 | 2.7 | 1.15 | 3.32 | 0.97 | 180 | 1.05 | 4.5 |
| KVM5770 vacuum environments | 70 | 1.9 | 1.15 | 3.32 | 0.8 | 180 | 1.05 | 4.5 |
* For vacuum environment applications, when the motor runs continuously at a speed below 50rpm, the drive current should be reduced to 80% of the values listed in the table above to prevent the motor from overheating.
Dimension Drawings
Torque-speed curve
Torque-speed curve
（drive phase current 2.7Arms, non-vacuum environment）
Torque-speed curve
（drive phase current 1.9Arms, vacuum environment）
Specifications
KVM5786：flange 57mm, length 86mm, holding torque 0.96Nm( in vacuum) or 1.2Nm(non-vacuum)
| model number | motor length (mm) |
current (RMS,A) |
resistance (Ω) |
inductance (mH) |
holding torque (N.m) |
rotor inertia (g.cm²) |
mass (Kg) |
cable diameter (mm) |
| KVM5786 non-vacuum environments | 86 | 2.7 | 1.43 | 4.05 | 1.2 | 228 | 1.28 | 4.5 |
| KVM5786 vacuum environments | 86 | 1.9 | 1.43 | 4.05 | 0.96 | 228 | 1.28 | 4.5 |
* For vacuum environment applications, when the motor runs continuously at a speed below 50rpm, the drive current should be reduced to 80% of the values listed in the table above to prevent the motor from overheating.
Dimension Drawings
L： length adder, 35mm for brake, 20mm for resolver feedback
Please contact us for dimension drawings of rear shaft, screw output shaft and handwheel options.
Please contact us for dimension drawings of rear shaft, screw output shaft and handwheel options.
Torque-speed curve
Torque-speed curve
（drive phase current 2.7Arms, non-vacuum environment）
Torque-speed curve
（drive phase current 1.9Arms, vacuum environment）
Specifications
KVM86128 flange 86mm, length 128mm, holding torque 4.4Nm( in vacuum) or 6Nm(non-vacuum)
| model number | motor length (mm) |
current (RMS,A) |
resistance (Ω) |
inductance (mH) |
holding torque (N.m) |
rotor inertia (g.cm²) |
mass (Kg) |
cable diameter (mm) |
| KVM86128 non-vacuum environments | 128 | 6.0 | 0.99 | 5.18 | 6 | 2700 | 4.7 | 5.0 |
| KVM86128 vacuum environments | 128 | 4.28 | 0.73 | 2.97 | 4.4 | 2700 | 4.7 | 5.0 |
* For vacuum environment applications, when the motor runs continuously at a speed below 50rpm, the drive current should be reduced to 80% of the values listed in the table above to prevent the motor from overheating.
Dimension Drawings
L： length adder, 49mm for brake, 20mm for resolver feedback
Please contact us for dimension drawings of rear shaft, screw output shaft and handwheel options.
Please contact us for dimension drawings of rear shaft, screw output shaft and handwheel options.
Torque-speed curve
Torque-speed curve
（drive phase current 6.0Arms, non-vacuum environment）
Torque-speed curve
（drive phase current 4.28Arms, vacuum environment）
