• Couplings
  • Slit Type

Cleanroom / Vacuum / Heat Resistant Couplings - Slit Type (PEEK) - Clamping Type


  • A Trace of Outgas
  • Made of PEEK

Dimension Drawing

MSXP-CCleanroom / Vacuum / Heat Resistant Couplings - Slit Type (PEEK) - Clamping Type寸法図


Part Number ALWFGM Screw Tightening
Torque (N・m)
Standard Bore Diameter
Add to Cart
MSXP-25C 25 8.5 25 4.25 8 M3 0.15 128.47 CAD Cart
MSXP-30C 30 10.2 30 5.1 9 M3 0.15 174.65 CAD Cart
MSXP-36C 36 12 35 6 11 M3 0.15 254.90 CAD Cart

Part Number Max. Bore Diameter
Max. Rotational Frequency
Moment of
Max. Lateral Misalignment
Max. Angular
Max. Axial
(g) *2
MSXP-25C 10 0.7 25000 3.0×10-7 110 0.05 0.5 ±0.1 3.8
MSXP-30C 12 1 21000 7.8×10-7 180 0.05 0.5 ±0.1 6.8
MSXP-36C 16 1.5 17000 1.8×10-6 280 0.05 0.5 ±0.1 10

*1: Correction of rated torque due to load fluctuation is not required. For more detailed information, please refer to Selection Guidelines.

※ The shaft's slip torque may be smaller than the coupling's rated torque depending on the shaft bore.

*2: These are values with max. bore diameter.

Part Number Standard Bore Diameter D1・D2
MSXP-25C 6-8 6-10 8-8 8-10 10-10
MSXP-30C 8-8 8-10 10-12 12-12  
MSXP-36C 10-14 12-14 14-15 15-15  

●All products are provided with hex socket head cap screw.
●Recommended tolerance for shaft diameters is h6 and h7.
●In case of mounting on D-cut shaft, be careful about the position of the D-cut surface of the shaft. ⇒Mounting and Maintenance
●For the shaft insertion amount to the coupling, see Mounting/maintenance. ⇒Mounting and Maintenance

Slip torque

As in the table below, the clamping type MSXP-C has different slip torque according to the bore diameter. Take care during selection.

Unit : N・m

Part Number Bore Diameter (mm)
6 8 10 12 14 15
MSXP-25C 0.5 0.6 0.7
MSXP-30C 0.8 1.1 1.5
MSXP-36C 0.7 1.2 1.8 2.2

These are test values based on the conditions of shaft dimensional allowance: h7, hardness: 34-40 HRC, and screw tightening torque of the values described in MSXP-C dimension tables. They are not guaranteed values.
Slip torque changes with usage conditions. Carry out tests under conditions similar to actual conditions in advance.


Clamping Type


MSXP-C_CCleanroom / Vacuum / Heat Resistant Couplings - Slit Type (PEEK)


Main Body PEEK (Polyether Ether Ketone)
Hex Socket Head Cap Screw PEEK (Polyether Ether Ketone)

PEEK's color may vary depending on the lot or other matters.


  • Property
Low Particle
Low Outgas
Chemical Resistance
Zero Backlash
Allowable Misalignment
Electrical Insulation
Cleanroom Specification
Allowable Operating Temperature -20℃ to 80℃

◎: Excellent ○: Very good

  • This is a resin spring coupling with single-piece construction.
  • It can be used in an environment or cleanroom where heat resistance and chemical resistance are required, such as FPD manufacturing equipment.
  • PEEK superior in physical and chemical properties is adopted. Outgas quantity is extremely low.
  • A plate spring formed by a slit allows eccentricity, angular misalignment, and end-play to be accepted.


FPD manufacturing device / Semiconductor manufacturing device

PEEK's Chemical Resistance

Chemical Name PEEK
10% Hydrochloric Acid
10% Sulfuric Acid
50% Sulfuric Acid ×
10% Nitric Acid
50% Nitric Acid ×
50% Hydrofluoric Acid ×
10% Phosphoric Acid
Formic Acid
10% Acetic Acid
Citric Acid
Chromic Acid
Boric Acid
Methyl Alcohol
10% Sodium Hydroxide
10% Potassium Hydroxide
Calcium Hydroxide
Hydrogen Sulfide (gas)
Sulfur Dioxide
Ammonium Nitrate
Sodium Nitrate
Calcium Carbonate
Calcium Chloride
Magnesium Chloride
Magnesium Sulfate
Zinc Sulfate
Hydrogen Peroxide

○: Available △: Available depending on conditions ×: Not available
This is test data with a specimen used at room temperature (23°C).
Chemical resistance changes with performance conditions. Always carry out tests under performance conditions similar to actual conditions in advance.

PEEK's Physical Properties

Property Test Method unit PEEK
Tensile Strength D638 N/mm2 97
Tensile Elongation D638 % 65
Bending Strength D790 N/mm2 156
Bending Elastic Modulus D790 GPa 4.1
Izod Impact Value (with Notch) D256 J/m 94
Rockwell Hardness D785 R / M Scale M99
Deflection Temperature Under Load (1.82MPa) D648 °C 152
Combustibility UL94 - V-0
Dielectric Constant (106 Hz) D150 - 3.3
Dielectric Loss Tangent (106 Hz) D150 - 0.003
Volume Resistivity (x1014) D257 Ω·m 4.9
Insulation Breakdown Strength D149 MV/m 17
Arc Resistance D495 sec 23
Specific Gravity D792 - 1.30
Water Absorption (in 23°C Water × 24 h) D570 % 0.500
Content by Percentage of Glass Fiber - % 0

Analysis of Outgas

Unit : (v/v ppm)

Component Content
Inorganic Gas Hydrogen 500 or Less
Carbon Monoxide 500 or Less
Carbon Dioxide 500 or Less
Organic Gas Methane 5 or Less
Ethane 5 or Less
Ethylene 5 or Less
Propane 5 or Less
Acetylene 5 or Less
i-Butane 5 or Less
n-Butane 5 or Less
Propylene 5 or Less

Both inorganic gas and organic gas are not more than the lower limit of determined amount and are not detected.

  • Measurement Method
    Inorganic gas----Gas chromatography (TCD)
    Organic gas----Gas chromatography (FID)
  • Measurement Conditions
    Heating temperature----100°C

MSXP-C_TTechnical Information

Eccentric Reaction Force

MSXP-C_TTechnical Information

Thrust reaction force

MSXP-C_TTechnical Information

Change in static torsional stiffness due to temperature

MSXP-C_TTechnical Information

Product List

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