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Flexible Couplings

JZM Diaphragm Coupling for Heavy Machinery

JZM Diaphragm Coupling for Heavy Machinery with model-specific technical data, engineering context and assembly drawing for preliminary selection.

Last reviewed Aug 29, 2026

Product Overview

JZM is a diaphragm coupling for heavy machinery, with nominal torque, permissible speed, bore, bore length, D/D1/S dimensions, torsional stiffness, inertia and mass. The diaphragm element transmits torque through a metallic flexible member, so torsional stiffness and alignment are important alongside bore and speed. One technical wording point remains subject to confirmation. The published model tables contain 30 size rows and provide torque values spanning 40–4000 N·m, permissible-speed values spanning 3400–10700 r/min, bore values spanning 14–100 mm. Use those values for preliminary comparison only; final materials, current standards, manufacturing details and operating suitability require confirmation from RONGXING DRIVE.

Key Features

  • Metallic diaphragm element for heavy machinery
  • Torsional stiffness is listed with torque and speed
  • Bore, D/D1/S, inertia and mass support envelope review
  • The model data provides torque values spanning 40–4000 N·m, permissible-speed values spanning 3400–10700 r/min, bore values spanning 14–100 mm for a traceable preliminary comparison.

Typical Selection Context

  • Heavy machinery and high-speed shaft interfaces
  • Drive systems where torsional stiffness and alignment control are important
JZM Diaphragm Coupling for Heavy Machinery product view 1
JZM Diaphragm Coupling for Heavy Machinery product view 1
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Technical Specification

The following model tables are provided for preliminary comparison. Keep the relevant assembly drawing with the selected row.

ModelNominal torque Tn N·mPermissible speed [n] r/minBore diameter dBore length L Y J₁DD₁STorsional stiffness ×10⁶ N·m/radMass moment of inertia kg·m²Mass kg
JZM1401070014～2827～62803980.370.00261.37
JZM263930020～3838～82925380.450.00732.65
JZM3100840025～4544～1121026380.560.0134.8
JZM4250670030～5560～11212877110.810.0427.64
JZM5500590035～6560～14214591111.20.0679.4
JZM6800510040～7584～142168105141.420.16517.15
JZM71000475045～8084～172180112151.90.2724.5
JZM81600430050～8584～172200120152.350.38729.4
JZM92000420055～9084～172205120202.70.4130.38
JZM102500400055～9084～172215128203.020.5133.9
JZM113150365060～95107～172235132233.460.7040.18
JZM124000340060～100107～212250145233.671.1355.96
ModelNominal torque Tn N·mPermissible speed [n] r/minBore diameter dBore length L Y J₁DD₁STorsional stiffness ×10⁶ N·m/radMass moment of inertia kg·m²Mass kg
JZM136300320063～110107～212270155235.21.6063
JZM1412500285065～120107～212300162277.82.1287
JZM1516000270070～125107～212320176278.432.81107
JZM1620000245075～130107～2523501863210.234.67124
JZM1725000230080～150132～2523702033210.976.14144
JZM1831500215090～160132～3024002303213.0710.45202
JZM19400001950100～180167～3024402453814.2614.08248
JZM20450001850110～190167～3524602603822.1320.77307
JZM21500001800120～200167～3524802803823.7026.09348
JZM22560001700130～220202～3525002953824.631.35382
JZM23630001600140～220202～3525403104429.7142.19451
JZM24800001450150～240202～4106003355032.6471.45631
JZM251000001400160～250242～4106203505037.6982.85679
JZM261250001300180～280242～4706603855050.43121.85889
JZM271600001200190～300282～4707204106071.51175.41063
JZM282000001150220～300282～4707404206093.37194.381114
JZM292500001100240～320330～47077045060114.53240.071248
JZM303150001050250～340330～55082049060130.76367.911655

Engineering Context

This model is best understood from its own construction: Metallic diaphragm element for heavy machinery; Torsional stiffness is listed with torque and speed; Bore, D/D1/S, inertia and mass support envelope review Industry selection practice checks torque and speed together with the movement, shaft interface, installation envelope and maintenance conditions allowed by that construction.

Technical Notes

  • Model symbols, units and empty or placeholder cells are shown as published.
  • Dimension letters must be interpreted with the relevant assembly drawing.
  • Published values support preliminary review and do not replace final engineering confirmation.

Assembly Drawing

JZM Diaphragm Coupling for Heavy Machinery assembly drawing
Use this assembly drawing together with the selected model row. Dimension symbols and connection details are drawing-specific; confirm final installation dimensions before manufacture or installation.

Information Required for Selection

  • Compare torque, speed, bore, stiffness and shaft-end dimensions
  • Confirm axial/angular movement, balance, temperature and the technical wording point
  • Send the exact model row, assembly drawing and actual duty data with the inquiry.

Product FAQ

Why is torsional stiffness important for JZM?

It influences torsional response and resonance in the connected driveline.

Can the diaphragm coupling absorb unlimited misalignment?

No. Use the specified movement limits and confirm them for the final size.

Are the published values final ordering values?

No. They are preliminary engineering data; confirm the selected model, drawing, dimensions, materials, standard and suitability with RONGXING DRIVE.

Technical data is provided for preliminary selection. Confirm the final model, dimensions, materials, applicable standard and operating suitability with RONGXING DRIVE before quotation, manufacture or installation.

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