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  • BOLTTE 45 steel single and double disc diaphragm couplings on white background
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BOLTTE 45 Steel Single & Double Disc Diaphragm Couplings

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BOLTTE 45 Steel Single & Double Disc Diaphragm Couplings
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BOLTTE 45 Steel Single & Double Disc Diaphragm Couplings

BOLTTE 45 steel disc couplings connect motor and driven shafts in servo, ball-screw and machine transmission assemblies. The series includes single- and double-disc configurations with clamp, set-screw and locking-assembly hubs.

Configuration guide

  • Single-disc configurations: HJSG, HJNST, HJNT and HJSZ.
  • Double-disc configurations: HJLG, HJNLT, HJMT and HJLZ.
  • Outer diameter, overall length and available bore range are shown in the configuration selector.
  • Both hubs and the coupling body are specified as 45 steel in the source product data.

45 steel disc couplings: compare series and fastening

HJSG, HJNST, HJNT and HJSZ are single-disc families in this listing; HJLG, HJNLT, HJMT and HJLZ are double-disc families. The prefix does not replace the full dimensional specification.

Selection detailWhat to check
Disc arrangementChoose the listed single- or double-disc construction for the installation.
Clamp, set-screw or locking hubConfirm the shaft interface, required fit and fastener access.
Outside diameter and lengthCheck both dimensions and specify the finished bore on each shaft end.

Can two couplings of equal outside diameter be substituted?

Not without checking length, hub style, bore limits and operating ratings. Verify shaft spacing and the complete selected drawing before installation.

Related selection references

Compare the drawings and intended function; these references are not a statement of direct interchangeability.

Ordering and installation

  • Select the required hub type, outer diameter, length and bore range.
  • State the finished bore dimensions for both shafts in the order requirements.
  • Confirm shaft tolerances, keyway or clamping requirements, installation clearance and fastener access before ordering.
  • Accurate shaft alignment is important. Verify torque, speed and permitted axial, angular and parallel misalignment for the application before use.
Disc diaphragm coupling model types 45 steel disc diaphragm coupling product features 45 steel single and double disc diaphragm coupling structure Diaphragm coupling materials and precision-bore details Rounded slit relief reduces stress concentration Rounded socket-head design and black-oxide surface treatment SUS304 four-hole discs and grade 12.9 screws JSG diaphragm coupling technical drawings JSG dimensions and technical specifications JLG dimensions and technical specifications JNST dimensions and JNLT technical drawings JNLT dimensions and JNT technical drawings JNT and JMT technical specifications JSZ dimensions and JLZ technical drawings JLZ technical specifications

Model / configuratie / SKU

BOLTTE 45 Steel Single & Double Disc Diaphragm Couplings
Model / configuratieSKU
Single-Disc Clamp HJSG / OD 34 x L 32 mm / Bore 6-15 mm 5021815681993
Single-Disc Clamp HJSG / OD 39 x L 34.5 mm / Bore 8-19 mm 5021815681994
Single-Disc Clamp HJSG / OD 44 x L 34.5 mm / Bore 8-22 mm 5021815681995
Single-Disc Clamp HJSG / OD 56 x L 45 mm / Bore 12-32 mm 5021815681996
Stepped Single-Disc Clamp HJNST / OD 56 x L 45 mm / Bore 12-24 mm 5021815681999
Stepped Single-Disc Clamp HJNST / OD 68 x L 53 mm / Bore 15-25 mm 5021815682000
Stepped Single-Disc Clamp HJNST / OD 82 x L 68 mm / Bore 17-32 mm 5017499588001
Stepped Single-Disc Set-Screw HJNT / OD 56 x L 45 mm / Bore 12-24 mm 5017499588002
Stepped Single-Disc Set-Screw HJNT / OD 68 x L 54 mm / Bore 14-28 mm 5017499588003
Stepped Single-Disc Set-Screw HJNT / OD 82 x L 68 mm / Bore 17-35 mm 5017499588004
Single-Disc Locking Assembly HJSZ / OD 56 x L 65 mm / Bore 12-24 mm 5017499588005
Single-Disc Locking Assembly HJSZ / OD 68 x L 65 mm / Bore 16-35 mm 5017499588006
Single-Disc Locking Assembly HJSZ / OD 82 x L 70 mm / Bore 16-35 mm 5017499588007
Double-Disc Clamp HJLG / OD 34 x L 45 mm / Bore 6-15 mm 5017499588008
Double-Disc Clamp HJLG / OD 39 x L 50 mm / Bore 8-19 mm 5017499588009
Double-Disc Clamp HJLG / OD 44 x L 50 mm / Bore 8-22 mm 5017499588010
Double-Disc Clamp HJLG / OD 56 x L 64 mm / Bore 12-30 mm 5017499588011
Stepped Double-Disc Clamp HJNLT / OD 56 x L 64 mm / Bore 12-22 mm 5017499588014
Stepped Double-Disc Clamp HJNLT / OD 68 x L 75 mm / Bore 15-25 mm 5017499588015
Stepped Double-Disc Clamp HJNLT / OD 82 x L 98 mm / Bore 17-32 mm 5017499588016
Stepped Double-Disc Set-Screw HJMT / OD 56 x L 64 mm / Bore 12-22 mm 5017499588017
Stepped Double-Disc Set-Screw HJMT / OD 68 x L 75 mm / Bore 15-28 mm 5017499588018
Stepped Double-Disc Set-Screw HJMT / OD 82 x L 98 mm / Bore 17-32 mm 5017499588019
Double-Disc Locking Assembly HJLZ / OD 56 x L 80 mm / Bore 12-24 mm 5017499588020
Double-Disc Locking Assembly HJLZ / OD 68 x L 80 mm / Bore 16-35 mm 5017499588021
Double-Disc Locking Assembly HJLZ / OD 82 x L 88 mm / Bore 16-35 mm 5017499588022

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