KTR
ROTEX GS Couplings
Engineering selection page for KTR ROTEX GS backlash-free jaw couplings - catalogue sizes, torque, speed, dimensions and spider compatibility.
Family overview
Backlash-free jaw couplings
KTR ROTEX GS couplings are pre-stressed backlash-free jaw couplings with elastomer spiders under compression. Aluminium hubs cover sizes 5 to 38; steel hubs cover sizes 42 to 90 in the standard catalogue range.
Engineering characteristics
Selection fundamentals
- Nominal torque ratings in the catalogue tables reference 98 ShA-GS spider selection unless a stiffness row states another spider basis.
- Maximum speed values use Hub Type 1.0 as the primary catalogue basis.
- Spider hardness and material govern temperature range, damping and torsional stiffness.
- Alternate hub configurations (HP, P, Compact, DKM, ZR/ZRS) are described at family level only on this page.
Selection guidance
Choosing a GS size
- Define shaft bore, nominal torque duty and maximum operating speed.
- Compare outside diameter and overall length against machine envelope constraints.
- Select spider hardness for temperature, damping and stiffness requirements using the spider reference table.
- Confirm misalignment limits against duty speed and selected spider where catalogue data is stated.
- Open the size PDP for catalogue dimensions before sending an engineering enquiry.
ROTEX GS size range
Select a catalogue size to review bore, torque, speed, dimensions and spider compatibility.
GS 5
Size
5
Nominal torque
0.9 Nm TKN (98 ShA)
Bore
6 mm max bore
Max speed
38000 rpm (Hub 1.0)
Outside dia.
10 mm OD
Length
15 mm length
Hub material
Aluminium
View GS specifications
GS 7
Size
7
Nominal torque
2 Nm TKN (98 ShA)
Bore
7 mm max bore
Max speed
38000 rpm (Hub 1.0)
Outside dia.
14 mm OD
Length
22 mm length
Hub material
Aluminium
View GS specifications
GS 9
Size
9
Nominal torque
5 Nm TKN (98 ShA)
Bore
11 mm max bore
Max speed
28000 rpm (Hub 1.0)
Outside dia.
20 mm OD
Length
30 mm length
Hub material
Aluminium
View GS specifications
GS 12
Size
12
Nominal torque
9 Nm TKN (98 ShA)
Bore
12 mm max bore
Max speed
28000 rpm (Hub 1.0)
Outside dia.
25 mm OD
Length
34 mm length
Hub material
Aluminium
View GS specifications
GS 14
Size
14
Nominal torque
12.5 Nm TKN (98 ShA)
Bore
16 mm max bore
Max speed
22000 rpm (Hub 1.0)
Outside dia.
30 mm OD
Length
35 mm length
Hub material
Aluminium
View GS specifications
GS 19
Size
19
Nominal torque
21 Nm TKN (98 ShA)
Bore
24 mm max bore
Max speed
17000 rpm (Hub 1.0)
Outside dia.
40 mm OD
Length
66 mm length
Hub material
Aluminium
View GS specifications
GS 24
Size
24
Nominal torque
60 Nm TKN (98 ShA)
Bore
28 mm max bore
Max speed
14000 rpm (Hub 1.0)
Outside dia.
55 mm OD
Length
78 mm length
Hub material
Aluminium
View GS specifications
GS 28
Size
28
Nominal torque
160 Nm TKN (98 ShA)
Bore
38 mm max bore
Max speed
11500 rpm (Hub 1.0)
Outside dia.
65 mm OD
Length
90 mm length
Hub material
Aluminium
View GS specifications
GS 38
Size
38
Nominal torque
325 Nm TKN (98 ShA)
Bore
45 mm max bore
Max speed
9500 rpm (Hub 1.0)
Outside dia.
80 mm OD
Length
114 mm length
Hub material
Aluminium
View GS specifications
GS 42
Size
42
Nominal torque
450 Nm TKN (98 ShA)
Bore
55 mm max bore
Max speed
9000 rpm (Hub 1.0)
Outside dia.
95 mm OD
Length
126 mm length
Hub material
Steel
View GS specifications
GS 48
Size
48
Nominal torque
525 Nm TKN (98 ShA)
Bore
62 mm max bore
Max speed
8000 rpm (Hub 1.0)
Outside dia.
105 mm OD
Length
140 mm length
Hub material
Steel
View GS specifications
GS 55
Size
55
Nominal torque
685 Nm TKN (98 ShA)
Bore
74 mm max bore
Max speed
7000 rpm (Hub 1.0)
Outside dia.
120 mm OD
Length
160 mm length
Hub material
Steel
View GS specifications
GS 65
Size
65
Nominal torque
940 Nm TKN (98 ShA)
Bore
80 mm max bore
Max speed
6000 rpm (Hub 1.0)
Outside dia.
135 mm OD
Length
185 mm length
Hub material
Steel
View GS specifications
GS 75
Size
75
Nominal torque
1920 Nm TKN (98 ShA)
Bore
95 mm max bore
Max speed
4800 rpm (Hub 1.0)
Outside dia.
160 mm OD
Length
210 mm length
Hub material
Steel
View GS specifications
GS 90
Size
90
Nominal torque
3600 Nm TKN (98 ShA)
Bore
110 mm max bore
Max speed
4000 rpm (Hub 1.0)
Outside dia.
200 mm OD
Length
245 mm length
Hub material
Steel
View GS specifications
ROTEX GS elastomer spider range
Spider hardness and material selection governs damping, temperature limits and torsional stiffness. Compatible size ranges are defined per spider designation in the catalogue tables.
| Spider | Hardness | Material | Temperature range | Application characteristics |
|---|---|---|---|---|
| 80 ShA-GS | 80 Shore A | Polyurethane | -50 C to +80 C | Exceptional vibration damping; ideal for electrical measuring systems. |
| 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-GS | 64 Shore D | Polyurethane | -20 C to +110 C | High torsional rigidity; suited for heavy-load AC servo drives. |
| 64 ShD-H-GS | 64 Shore D | Hytrel | -50 C to +120 C | Designed for planetary gears and backlash-free gear drives. |
| 72 ShD-GS | 72 Shore D | Polyurethane | -20 C to +110 C | High torque/torsional rigidity; for indexing tables. |
| 72 ShD-H-GS | 72 Shore D | Hytrel | -50 C to +120 C | Extreme torsional spring stiffness; high-speed servo axes. |
Request an Engineering Quote
Share shaft bore, speed, torque duty and ordering designation. Golden Bearing Company supports KTR ROTEX GS selection using catalogue engineering data. Contact us with shaft bore, speed, torque duty and configuration requirements for quotation review.