Golden Bearing Company
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Manufacturer KTR
ROTEX GS
ROTEX GS
GS 38
Availability
Confirm at quotation
KTR · ROTEX GS · Jaw coupling · GS 38
Nominal torque TKN
325 Nm
Max bore
45 mm
Max speed
9500 rpm
Outside dia.
80 mm
- Manufacturer
- KTR
- Product Family
- ROTEX GS Couplings
- Series
- ROTEX GS
- Designation
- GS 38
- Configuration
- ROTEX GS
KTR ROTEX GS size 38 catalogue data for engineering selection.
- Product Type
- Jaw coupling
- Industry
- Industrial drives, precision automation
Why Source Through Golden Bearing Company
Authorised industrial distributor
Engineering Support
Duty review, bore selection, and application engineering assistance
Authorised Manufacturer Data
Specifications published exactly as manufacturer catalogue data
Technical Assistance
Configuration, interchangeability, and spare element guidance
Product Overview
KTR GS 38 is a ROTEX GS backlash-free jaw coupling size 38 with Aluminium hubs. Nominal torque TKN is 325 Nm at 98 ShA-GS spider selection. Catalogue envelope is 80 mm outside diameter by 114 mm overall length with maximum bore 45 mm.
Commercial Identification
Authoritative procurement identifiers for ERP, RFQ, and purchase order entry. Copy values directly where shown.
- Manufacturer
- KTR
- Product Family
- ROTEX GS Couplings
- Series
- ROTEX GS
- Designation
- GS 38
- Configuration
- ROTEX GS
Selection Guidance
Engineering checkpoints when specifying KTR GS 38.
Engineering Specifications
KTR catalogue values for GS 38. Parameters not tabulated for this size are omitted rather than estimated.
Key catalogue specifications
| Designation | GS 38 |
|---|---|
| Nominal torque TKN (98 ShA) | 325 Nm |
| Maximum finished bore | 45 mm |
| Maximum speed (Hub 1.0) | 9500 rpm |
| Hub material | Aluminium |
| Outside diameter D_H | 80 mm |
| Overall length L | 114 mm |
| Setscrew size | M8 |
| Setscrew tightening torque T_A | 15 Nm |
| Torsional stiffness | 26770 Nm/rad (98 ShA spider) |
| Weight | 0.47 kg (per hub) |
Misalignment limits
| Axial shift | +1.8 / -0.7 |
|---|---|
| Radial offset | 0.12 mm |
| Angular offset | 0.9 deg |
Dimensions
Mounting envelope dimensions from KTR catalogue tables for layout and drive integration.
Max bore
45 mm
Outside dia. (D_H)
80 mm
Overall length (L)
114 mm
| Maximum finished bore | 45 mm |
|---|---|
| Outside diameter (D_H) | 80 mm |
| Overall length (L) | 114 mm |
| Setscrew size | M8 |
| Setscrew tightening torque T_A | 15 Nm |
KTR Catalogue Reference
Authoritative source for the engineering values published on this page.
Published data basis
Engineering values on this page follow KTR catalogue tables for KTR GS 38. Additional catalogue caveats apply: Alternate hub Type speeds tabulated at 7000 rpm in extract A. Parameters not shown require KTR manufacturer catalogue verification before design sign-off.
Applications
Typical KTR ROTEX GS applications for GS 38.
Industrial jaw coupling
Backlash-free drive
Elastomer spider selection
General machinery
Pump and fan drives
Configuration and Spider Compatibility
Elastomer spider selection for KTR GS 38.
ROTEX GS coupling role
Backlash-free jaw coupling with elastomer spider under compression. Spider hardness governs damping, temperature limits and torsional stiffness.
Compatible elastomer spiders
| Spider | Hardness | Material | Temperature range | Application characteristics |
|---|---|---|---|---|
| 92 ShA-GS | 92 Shore A | Polyurethane | -40 C to +90 C | Standard automation, control systems, and main spindle drives. |
| 98 ShA-GS | 98 Shore A | Polyurethane | -30 C to +90 C | Standard high-dynamic positioning drives and machine spindles. |
| 52 ShD-S-GS | 52 Shore D | Polyurethane | -40 C to +120 C | Thermally expanded positioning; permanently pressure-resistant. |
| 57 ShD-GS | 57 Shore D | Polyurethane | -30 C to +90 C | Spindles with high-rated torques; medium-low damping limits. |
| 64 ShD-H-GS | 64 Shore D | Hytrel | -50 C to +120 C | Designed for planetary gears and backlash-free gear drives. |
| 72 ShD-H-GS | 72 Shore D | Hytrel | -50 C to +120 C | Extreme torsional spring stiffness; high-speed servo axes. |
Frequently Asked Questions
Engineering and procurement answers for specification review and quotation.
What is KTR GS 38?
KTR GS 38 is a ROTEX GS backlash-free jaw coupling size 38 with Aluminium hubs. Nominal torque TKN is 325 Nm at 98 ShA-GS spider selection per KTR catalogue tables.
What is the maximum bore for KTR GS 38?
Catalogue maximum finished bore for KTR GS 38 is 45 mm. Confirm hub type and spider selection against shaft diameter and duty.
What is the maximum speed of KTR GS 38?
Maximum speed for KTR GS 38 is 9500 rpm at Hub Type 1.0 per KTR catalogue tables used on this page.
Which spiders are compatible with KTR GS 38?
Compatible ROTEX GS spider designations for size 38 are listed in the Compatible elastomer spiders section. Spider hardness governs damping, temperature limits and torsional stiffness.
How do I request a quote for KTR GS 38?
Send shaft bore, torque duty, speed, configuration (hub type / EK or DK layout where applicable) and application context. Golden Bearing Company supports engineering-led KTR ROTEX GS identification without publishing price or stock on this page.
Request an Engineering Quote
Share KTR GS 38 designation, shaft bore, torque duty, speed and configuration context for engineering quotation.