DFC Disc, PUFlex GS/GR/EC, Encoder, Jaw and Keyless Clamping Couplings — backlash-free, torsionally stiff, precision flexible shaft couplings for servo, CNC, encoder and industrial drive applications.
Backlash-free, high torsionally stiff disc flexible coupling. Three or five piece assembly of Aluminium hubs and Stainless Steel disc sets — available in Single Lamina (SL) and Double Lamina (DL) versions. Max 10,000 RPM. Sizes DFC 20 to DFC 100.
Made with Stainless Steel Disc Sets bolted alternately to Aluminium Hubs. The SL (Single Lamina) version is a 3-piece assembly; the DL (Double Lamina) is a 5-piece assembly with a spacer, allowing greater parallel and axial misalignment.
| Parameter | SL Series | DL Series |
|---|---|---|
| Assembly | 3-piece | 5-piece (with spacer) |
| Disc Sets | 1 × SS disc set | 2 × SS disc sets |
| Hub Material | Aluminium (clamping) | |
| Disc Material | Stainless Steel | |
| Max RPM | 10,000 | 10,000 |
| Angular Misalign. | 1° | 1° |
| Parallel Misalign. | 0.02 mm | Up to 0.55 mm |
| Axial Misalign. | 0.15–0.75 mm | 0.35–1.50 mm |
| Torque Range | 2–250 Nm | 2–250 Nm |
| Torsional Stiffness | Higher (half of DL) | Lower (approx. half SL) |
| Ordering Code | DFC 00 XX Bore YY–ZZ | |
DFC Single Lamina (SL) — 3-piece assembly. Highest torsional stiffness in the DFC range. Parallel misalignment limited to 0.02 mm — ideal for very precise motion control.
| Size | Type | Bore Min d1 (mm) | Bore Max d2 (mm) | Outer Dia D (mm) | Total L (mm) | Step Dia D1 (mm) | Lamina ID d3 (mm) | Hub L l1&l2 (mm) | Gap E (mm) | Screw | Tight. Torque Ts (Nm) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DFC 20 SL | C | 3.00 | 12.00 | 26 | 24 | — | 12.10 | 11.20 | 1.6 | M2.5 | 0.8 |
| DFC 25 SL | C | 5.00 | 14.00 | 29 | 24 | — | 14.50 | 11.00 | 2.0 | M2.5 | 0.8 |
| DFC 30 SL | A/B/C | 5.00 | 16.00 | 34 | 27 | 22 | 14.50 | 12.40 | 2.2 | M3 | 1.5 |
| DFC 35 SL | C | 6.00 | 18.00 | 39 | 34 | — | 17.00 | 15.50 | 3.0 | M4 | 3 |
| DFC 40 SL | A/B/C | 8.00 | 22.00 | 44 | 34 | 34 | 20.00 | 15.50 | 3.0 | M4 | 3 |
| DFC 50 SL | A/B/C | 8.00 | 30.00 | 56 | 44 | 38 | 26.10 | 20.75 | 2.5 | M5 | 8 |
| DFC 55 SL | C | 10.00 | 30.00 | 63 | 50.6 | — | 31.00 | 24.00 | 2.6 | M6 | 10.5 |
| DFC 60 SL | A/B/C | 11.00 | 35.00 | 68 | 54 | 46 | 31.20 | 25.35 | 3.3 | M6 | 10.5 |
| DFC 80 SL | C | 18.00 | 40.00 | 82 | 68 | — | 38.10 | 30.00 | 8.0 | M8 | 25 |
| DFC 90 SL | C | 25.00 | 45.00 | 94 | 68 | — | 42.20 | 30.00 | 8.0 | M8 | 25 |
| DFC 100 SL | C | 32.00 | 45.00 | 104 | 70 | — | 48.20 | 30.00 | 10.0 | M8 | 25 |
| Size | Rated Torque (Nm) | Parallel Misalign. (mm) | Axial Misalign. (mm) | Angular (°) | Max RPM | Torsional Stiffness (Nm/rad) | Inertia (Kgcm²) |
|---|---|---|---|---|---|---|---|
| DFC 20 SL | 2 | 0.02 | 0.15 | 1 | 10,000 | 3,700 | 0.0236 |
| DFC 25 SL | 4 | 0.02 | 0.20 | 1 | 10,000 | 5,600 | 0.0370 |
| DFC 30 SL | 5 | 0.02 | 0.20 | 1 | 10,000 | 8,000 | 0.0820 |
| DFC 35 SL | 8 | 0.02 | 0.25 | 1 | 10,000 | 18,000 | 0.1650 |
| DFC 40 SL | 10 | 0.02 | 0.30 | 1 | 10,000 | 20,000 | 0.2955 |
| DFC 50 SL | 25 | 0.02 | 0.40 | 1 | 10,000 | 32,000 | 1.0000 |
| DFC 55 SL | 40 | 0.02 | 0.45 | 1 | 10,000 | 50,000 | 1.9000 |
| DFC 60 SL | 60 | 0.02 | 0.45 | 1 | 10,000 | 70,000 | 2.7000 |
| DFC 80 SL | 100 | 0.02 | 0.55 | 1 | 10,000 | 140,000 | 7.1000 |
| DFC 90 SL | 180 | 0.02 | 0.65 | 1 | 10,000 | 100,000 | 12.3000 |
| DFC 100 SL | 250 | 0.02 | 0.75 | 1 | 10,000 | 120,000 | 18.6000 |
DFC Double Lamina (DL) — 5-piece assembly with intermediate spacer. Allows approximately 10–26× more parallel misalignment and nearly double the axial misalignment compared to DL, at roughly half the torsional stiffness.
| Size | Bore Min (mm) | Bore Max (mm) | Outer Dia D (mm) | Total L (mm) | Lamina ID d3 (mm) | Hub L l1&l2 (mm) | Spacer W L1 (mm) | Gap E (mm) | Screw | Tight. Ts (Nm) |
|---|---|---|---|---|---|---|---|---|---|---|
| DFC 20 DL | 3.00 | 12.00 | 26 | 32 | 12.00 | 11.20 | 6.40 | 1.60 | M2.5 | 0.8 |
| DFC 25 DL | 5.00 | 14.00 | 29 | 33 | 14.50 | 11.00 | 7.00 | 2.00 | M2.5 | 0.8 |
| DFC 30 DL | 5.00 | 16.00 | 34 | 38 | 14.50 | 12.40 | 8.80 | 2.20 | M3 | 1.5 |
| DFC 35 DL | 6.00 | 18.00 | 39 | 48 | 17.00 | 15.50 | 11.00 | 3.00 | M4 | 3 |
| DFC 40 DL | 8.00 | 22.00 | 44 | 48 | 20.00 | 15.50 | 11.00 | 3.00 | M4 | 3 |
| DFC 50 DL | 8.00 | 30.00 | 56 | 60 | 26.10 | 20.75 | 13.50 | 2.50 | M5 | 8 |
| DFC 55 DL | 10.00 | 30.00 | 63 | 69 | 31.00 | 24.00 | 15.65 | 2.60 | M6 | 10.5 |
| DFC 60 DL | 11.00 | 35.00 | 68 | 73 | 31.20 | 25.35 | 16.00 | 3.30 | M6 | 10.5 |
| DFC 80 DL | 18.00 | 40.00 | 82 | 98 | 38.10 | 30.00 | 22.00 | 8.00 | M8 | 25 |
| DFC 90 DL | 25.00 | 45.00 | 94 | 99 | 42.20 | 30.00 | 23.00 | 8.00 | M8 | 25 |
| DFC 100 DL | 32.00 | 45.00 | 104 | 102 | 48.20 | 30.00 | 22.00 | 10.00 | M8 | 25 |
| Size | Rated Torque (Nm) | Parallel Misalign. (mm) | Axial Misalign. (mm) | Angular (°) | Max RPM | Torsional Stiffness (Nm/rad) | Inertia (Kgcm²) |
|---|---|---|---|---|---|---|---|
| DFC 20 DL | 2 | 0.15 | 0.35 | 1 | 10,000 | 1,850 | 0.0340 |
| DFC 25 DL | 4 | 0.16 | 0.40 | 1 | 10,000 | 2,800 | 0.0530 |
| DFC 30 DL | 5 | 0.18 | 0.40 | 1 | 10,000 | 4,000 | 0.1150 |
| DFC 35 DL | 8 | 0.24 | 0.50 | 1 | 10,000 | 9,000 | 0.2678 |
| DFC 40 DL | 10 | 0.24 | 0.60 | 1 | 10,000 | 10,000 | 0.4262 |
| DFC 50 DL | 25 | 0.28 | 0.80 | 1 | 10,000 | 16,000 | 1.4200 |
| DFC 55 DL | 40 | 0.31 | 0.80 | 1 | 10,000 | 25,000 | 2.6200 |
| DFC 60 DL | 60 | 0.34 | 0.90 | 1 | 10,000 | 35,000 | 3.7800 |
| DFC 80 DL | 100 | 0.52 | 1.10 | 1 | 10,000 | 70,000 | 10.3400 |
| DFC 90 DL | 180 | 0.52 | 1.30 | 1 | 10,000 | 50,000 | 17.7600 |
| DFC 100 DL | 250 | 0.55 | 1.50 | 1 | 10,000 | 60,000 | 27.1000 |
DFC couplings are the first choice for precision servo and motion control where zero backlash and high torsional stiffness are non-negotiable requirements.
Backlash-free coupling of servo motor shafts to ball screws and spindles in CNC machines and machining centres.
Precise torque transmission from servo to ball screw without angular error or backlash for accurate linear positioning.
High-speed, bidirectional drives on CNC X-Y tables where reversal backlash must be zero.
Precise motion coupling in CT scanners, surgical robots and diagnostic platforms where reliability is critical.
Velocity-sensing coupling where constant angular velocity is essential for accurate speed feedback.
High-RPM spindle drives on grinding and milling machines requiring stiff, vibration-free coupling.
Aluminium hub with Steel clamping ring and Polyurethane spider. Backlash-free, fail-safe, electrically isolating jaw coupling for servo, encoder and stepper motor applications. Sizes 14 to 48 — torque up to 525 Nm, speeds up to 25,400 RPM.
Three-piece assembly: Aluminium hub + Steel clamping ring + Polyurethane spider. Concave jaw profile and convex spider lobes ensure superior misalignment absorption. Bore tolerance H7 as standard.
| Shore | Colour | Temp (Normal) | Temp (Max) | Best For |
|---|---|---|---|---|
| 80 Shore A | Blue | −50 to +80 °C | −60 to +120 °C | Low torque, max misalignment |
| 92 Shore A | Yellow | −40 to +90 °C | −50 to +120 °C | Medium torque & misalignment |
| 98 Shore A | Red | −30 to +90 °C | −40 to +120 °C | High torque, less misalignment |
| Parameter | Value |
|---|---|
| Hub Material | Aluminium Alloy (sizes 14–38) |
| Clamping Ring | Steel |
| Spider Material | Polyurethane |
| Sizes Available | 14, 19, 24, 28, 38, 42, 48 |
| Bore Tolerance | H7 (standard) |
| Max Torque (92 Sh-A) | 7.5 – 310 Nm |
| Max Torque (98 Sh-A) | 12.5 – 525 Nm |
| Max RPM (Size 14) | 25,400 |
| Max RPM (Size 48) | 7,200 |
| Angular Misalign. | 1° (92 Sh-A) / 0.9° (98 Sh-A) |
| Axial Misalign. | +1.0/−0.5 to +2.1/−1.0 mm |
| Radial Misalign. | 0.06 – 0.23 mm |
| Ordering Code | PUFlex GS 6.0 Al-St 00 Bore XX–YY |
| Size | Bore Min d1 (mm) | Bore Max d2 (mm) | Outer Dia D (mm) | Total L (mm) | Spider ID d3 (mm) | Hub L l1&l2 (mm) | Gap E (mm) | Spider W b (mm) | Isolation Gap g (mm) | Wall Thick. a (mm) | Screw | Tight. Ts (Nm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 14 | 6 | 14 | 30 | 50 | 10.5 | 18.5 | 13 | 10 | 1.5 | 2 | M3 × 4 no. | 1.34 |
| 19 | 8 | 20 | 40 | 66 | 18 | 25 | 16 | 12 | 2.0 | 3 | M4 × 6 no. | 3 |
| 24 | 11 | 32 | 55 | 78 | 27 | 30 | 18 | 14 | 2.0 | 3 | M5 × 4 no. | 6 |
| 28 | 15 | 38 | 65 | 90 | 30 | 35 | 20 | 15 | 2.5 | 4 | M5 × 8 no. | 6 |
| 38 | 20 | 48 | 80 | 114 | 38 | 45 | 24 | 18 | 3.0 | 4 | M6 × 8 no. | 10 |
| 42 | 25 | 51 | 95 | 126 | 46 | 50 | 26 | 20 | 3.0 | 4 | M8 × 4 no. | 25 |
| 48 | 28 | 55 | 105 | 140 | 51 | 56 | 28 | 21 | 3.5 | 4 | M10 × 4 no. | 49 |
| Size | Shore A | Rated Torque (Nm) | Max RPM | Torsional Stiffness (Nm/rad) | Radial Stiffness (N/mm) | Axial Misalign. (mm) | Radial Misalign. (mm) | Angular (°) | Weight (Kg) | Inertia (Kgcm²) |
|---|---|---|---|---|---|---|---|---|---|---|
| 14 | 92 | 7.5 | 25,400 | 344 | 336 | +1.0 to −0.5 | 0.15 | 1 | 0.11 | 0.14 |
| 98 | 12.5 | 25,400 | 513 | 604 | +1.0 to −0.5 | 0.09 | 0.9 | |||
| 19 | 92 | 10 | 19,000 | 1,720 | 1,120 | +1.2 to −0.5 | 0.10 | 1 | 0.275 | 0.66 |
| 98 | 17 | 19,000 | 2,580 | 2,010 | +1.2 to −0.5 | 0.06 | 0.9 | |||
| 24 | 92 | 35 | 13,800 | 4,296 | 1,480 | +1.4 to −0.5 | 0.14 | 1 | 0.615 | 2.82 |
| 98 | 60 | 13,800 | 6,189 | 2,560 | +1.4 to −0.5 | 0.10 | 0.9 | |||
| 28 | 92 | 95 | 11,700 | 6,876 | 1,780 | +1.5 to −0.7 | 0.11 | 1 | 0.94 | 6.50 |
| 98 | 160 | 11,700 | 10,314 | 3,200 | +1.5 to −0.7 | 0.08 | 0.9 | |||
| 38 | 92 | 190 | 9,550 | 13,752 | 2,350 | +1.8 to −0.7 | 0.17 | 1 | 1.97 | 20.10 |
| 98 | 325 | 9,550 | 21,486 | 4,400 | +1.8 to −0.7 | 0.12 | 0.9 | |||
| 42 | 92 | 265 | 8,050 | 14,490 | 2,430 | +2.0 to −1.0 | 0.19 | 1 | 3.07 | 43.25 |
| 98 | 450 | 8,050 | 48,000 | 5,570 | +2.0 to −1.0 | 0.14 | 0.9 | |||
| 48 | 92 | 310 | 7,200 | 18,055 | 2,580 | +2.1 to −1.0 | 0.23 | 1 | 3.86 | 68.60 |
| 98 | 525 | 7,200 | 55,925 | 5,930 | +2.1 to −1.0 | 0.16 | 0.9 |
PUFlex GS 6.0 Al-St is the precision servo-grade jaw coupling — combining the simplicity of a jaw design with the zero-backlash performance of servo applications.
Backlash-free coupling of servo/stepper shaft to ball screw, encoder or spindle.
Axis coupling on CNC machining centres, lathes and multi-axis platforms.
Precise, electrically isolated coupling in diagnostic and imaging machines.
High-accuracy positioning stages in semiconductor, optics and metrology.
Tachogenerators and rotary encoders requiring constant velocity transmission.
Spindle coupling where vibration and runout must be minimised at high speed.
Heavy-duty three-piece jaw coupling with Aluminium, Cast Iron or Steel hubs and Polyurethane spider. Sizes 19 to 90 — torque up to 4,000 Nm. Designed for industrial drives: pumps, cooling towers, gearboxes, conveyors, and rolling mills.
Aluminium (sizes 19–28) or Cast Iron/Steel (sizes 38–90) hubs with a Polyurethane spider. Failsafe design — if spider fails, the jaw teeth continue to transmit torque. Electrical and frequency isolation between driver and driven.
| Shore | Colour | Temp (Normal) | Best For |
|---|---|---|---|
| 80 Shore A | Blue | −50 to +80 °C | High vibration dampening |
| 92 Shore A | Yellow | −40 to +90 °C | Medium torque |
| 98 Shore A | Red | −30 to +90 °C | High torque drives |
| Parameter | Specification |
|---|---|
| Size Range | 19 to 90 |
| Hub Materials | Aluminium / Cast Iron / Steel |
| Spider Material | Polyurethane |
| Max Torque (98 Sh-A) | 17 – 3,600 Nm |
| Max Torque (92 Sh-A) | 10 – 2,400 Nm |
| Max RPM (Size 19) | 16,708 |
| Max RPM (Size 90) | 3,300 |
| Axial Misalign. | 1.2 – 3.4 mm |
| Radial Misalign. | 0.20 – 0.50 mm |
| Angular Misalign. | 0.9° – 1.2° |
| Ordering Code | PUFlex GR 00 Bore XX–YY |
| Size | Bore Min d1 (mm) | Bore Max Std d2 (mm) | Bore Max Large (mm) | Outer Dia D (mm) | Spider ID d3 (mm) | Total L Std (mm) | Hub L L1 Std (mm) | Spider W b (mm) | Wall a (mm) |
|---|---|---|---|---|---|---|---|---|---|
| 19 | 6 | 19 | 24 | 40 | 18 | 66 | 25 | 12 | 2.0 |
| 24 | 9 | 24 | 28 | 55 | 27 | 78 | 30 | 14 | 2.0 |
| 28 | 10 | 28 | 38 | 65 | 30 | 90 | 35 | 15 | 2.5 |
| 38 | 12 | 38 | 48 | 80 | 38 | 114 | 45 | 18 | 3.0 |
| 42 | 14 | 42 | 55 | 95 | 46 | 126 | 50 | 20 | 3.0 |
| 48 | 15 | 48 | 62 | 105 | 51 | 140 | 56 | 21 | 3.5 |
| 55 | 20 | 55 | 74 | 120 | 60 | 160 | 65 | 22 | 4.0 |
| 65 | 22 | 65 | 80 | 135 | 68 | 185 | 75 | 26 | 4.5 |
| 75 | 30 | 75 | 95 | 160 | 80 | 210 | 85 | 30 | 5.0 |
| 90 | 40 | 90 | 110 | 200 | 100 | 245 | 100 | 34 | 5.5 |
| Size | Torque 98 Sh-A (Nm) | Torque 92 Sh-A (Nm) | Torque 64 Sh-D (Nm) | Max RPM | Axial (mm) | Radial (mm) | Angular (°) | Stiff. 98 (10³ Nm/rad) | Stiff. 92 (10³ Nm/rad) | Weight (Kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| 19 | 17 | 10 | 21 | 16,708 | 1.2 | 0.20 | 1.2 | 2.92 | 1.28 | 0.51 |
| 24 | 60 | 35 | 45 | 12,100 | 1.4 | 0.22 | 0.9 | 9.93 | 4.86 | 1.10 |
| 28 | 160 | 95 | 200 | 10,100 | 1.5 | 0.05 | 0.9 | 26.77 | 10.90 | 1.80 |
| 38 | 325 | 190 | 405 | 8,300 | 1.8 | 0.28 | 1.0 | 48.57 | 21.05 | 2.50 |
| 42 | 450 | 265 | 560 | 7,000 | 2.0 | 0.32 | 1.0 | 54.50 | 23.74 | 3.90 |
| 48 | 525 | 310 | 655 | 6,350 | 2.1 | 0.36 | 1.1 | 65.29 | 36.70 | 5.30 |
| 55 | 505 | 410 | 625 | 5,500 | 2.2 | 0.38 | 1.1 | 94.97 | 50.72 | 7.90 |
| 65 | 940 | 625 | 1,175 | 4,950 | 2.6 | 0.42 | 1.2 | 129.51 | 97.13 | 11.90 |
| 75 | 1,920 | 1,280 | 2,400 | 4,150 | 3.0 | 0.48 | 1.2 | 197.50 | 113.32 | 18.64 |
| 90 | 3,600 | 2,400 | 4,000 | 3,300 | 3.4 | 0.50 | 1.2 | 312.20 | 190.09 | 33.64 |
PUFlex GR is the workhorse coupling for industrial power transmission — wherever high torque, vibration dampening, and misalignment tolerance matter.
Motor-to-pump coupling in hydraulic power packs, water pumps, and process pumps.
Fan drives and cooling tower motors requiring vibration-isolating couplings.
Belt conveyor and roller conveyor drive coupling under variable shock loads.
Heavy-duty reversing drives in steel and aluminium rolling mill applications.
Motor-to-gearbox coupling absorbing starting torque shocks and vibrations.
Smooth, vibration-damped drives in weaving, spinning and winding machines.
Three-piece assembly of two Steel hubs and a Special Grade Polyurethane loop element. Backlash-free, electrically isolating encoder coupling with exceptional angular and radial misalignment capacity. Sizes EC 10 to EC 40 — up to 5 Nm, 3,000 RPM.
The polyurethane element physically separates both steel hubs, providing electrical and frequency isolation between driver and driven. Failsafe, no lubrication, no maintenance. Available in pilot bore and finish bores.
| Size | Outer Dia D (mm) | Hub Dia d (mm) | Hub L h (mm) | Total L (mm) | Bore Min (mm) | Bore Max (mm) | Radial Misalign. (mm) | Angular (°) | Axial (mm) | Max Torque (Nm) | Max RPM | Torsional Stiff. (Nm/rad) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| EC 10 | 26 | 19 | 8 | 28 | 5 | 10 | 2.6 | 10 | 1.2 | 0.5 | 3,000 | 5 |
| EC 20 | 38 | 23 | 9.5 | 35 | 6 | 12 | 3.2 | 10 | 2.0 | 1.5 | 3,000 | 10 |
| EC 30 | 48 | 26 | 13 | 48 | 8 | 14 | 3.2 | 12 | 2.0 | 2.0 | 3,000 | 13 |
| EC 40 | 56 | 28 | 16 | 58 | 10 | 16 | 3.2 | 12 | 2.0 | 5.0 | 3,000 | 17 |
PUFlex EC is designed for low-torque, high-misalignment encoder and tachogenerator applications where electrical isolation is critical.
Connects encoder shaft to motor or machine shaft with complete electrical isolation and misalignment absorption.
Speed-sensing coupling where constant velocity and electrical isolation are both required.
Light-duty stepper motor coupling in instrumentation and positioning devices.
Motion coupling in damper actuators and HVAC positioning systems.
One-piece torsionally rigid flexible coupling for shaft encoders, tachogenerators, and stepper motors. Available in AF (flange clamp) and AS (set screw) types. Angular misalignment up to 5°, parallel up to 0.2 mm. Outer diameter 14–50 mm.
One-piece construction (helical beam or slotted design) in Aluminium Alloy, Stainless Steel, Brass or Nylon. Connects two shafts while compensating misalignment without affecting velocity or acceleration — essential for accurate encoder feedback.
| Parameter | Specification |
|---|---|
| Construction | One-piece (helical/slotted beam) |
| Materials | Al Alloy / Stainless Steel / Brass / Nylon |
| Clamping Types | AF (split flange clamp) / AS (set screw) |
| OD Range | 14 – 50 mm |
| Bore Range | 2 – 30 mm |
| Max Torque | 0.5 – 25 Nm |
| Angular Misalign. | Up to 5° |
| Lateral Misalign. | Up to 0.25 mm |
| Axial Misalign. | Up to 0.25 mm |
| Backlash | Zero |
| Ordering Code | AS / AF OD-d1-d2, L=XX |
AF Type — Split flange clamping. Preferred where frequent shaft removal is needed and a positive, even clamping force is required across the bore. Screw torques from 50–400 Ncm.
| Outer Dia D (mm) | Length L (mm) | Bore d1 & d2 H7 min (mm) | Bore d1 & d2 H7 max (mm) | Clamping Screw |
|---|---|---|---|---|
| 14 | 20 | 2.00 | 4.00 | M2.5 |
| 16 | 24 | 3.00 | 6.00 | M2.5 |
| 20 | 28 | 4.00 | 10.00 | M3 |
| 25 | 32 | 5.00 | 11.00 | M3 |
| 32 | 40 | 8.00 | 12.00 | M4 |
| 35 | 40 / 50 | 10.00 | 17.00 | M5 |
| 40 | 50 | 11.00 | 20.00 | M5 |
| 50 | 50 / 60 | 12.00 | 25.00 | M6 |
AS Type — Set screw clamping. Simple and compact for permanent or infrequent assembly. Accepts larger maximum bore sizes than the AF type for the same OD.
| Outer Dia D (mm) | Length L (mm) | Bore d1 & d2 H7 min (mm) | Bore d1 & d2 H7 max (mm) | Clamping Screw |
|---|---|---|---|---|
| 14 | 20 | 2.00 | 4.00 | M3 |
| 16 | 24 | 3.00 | 8.00 | M3 |
| 20 | 28 | 4.00 | 11.00 | M4 |
| 25 | 32 | 5.00 | 12.70 | M4 |
| 32 | 40 | 8.00 | 15.00 | M4 |
| 35 | 40 / 50 | 10.00 | 20.00 | M5 |
| 40 | 50 | 11.00 | 25.00 | M5 |
| 50 | 50 / 60 | 12.00 | 30.00 | M6 |
| OD (mm) | Rated Torque (Nm) | Lateral Misalign. (mm) | Axial Misalign. (mm) | Angular (°) | Torsional Spring Rate (Ncm/rad) | Clamp Tightening Torque (Ncm) |
|---|---|---|---|---|---|---|
| 14 | 0.5 | 0.15 | 0.15 | 3 | 475 | 50 |
| 16 | 0.60 | 0.15 | 0.15 | 3 | 575 | 50 |
| 20 | 1.4 | 0.20 | 0.20 | 5 | 1,250 | 100 |
| 25 | 2.5 | 0.20 | 0.20 | 5 | 1,675 | 100 |
| 32 | 7 | 0.25 | 0.25 | 5 | 2,000 | 200 |
| 35 | 8.5 | 0.25 | 0.25 | 5 | 2,250 | 200 |
| 40 | 11 | 0.25 | 0.25 | 5 | 2,500 | 400 |
| 50 | 25 | 0.25 | 0.25 | 5 | 3,000 | 400 |
Wherever precise rotary position or velocity feedback matters, Encoder Couplings ensure that shaft misalignment never introduces angular velocity error.
Direct coupling of incremental and absolute rotary encoders to motor or machine shafts.
Speed sensing for DC drives, spindle feedback and closed-loop control systems.
Precise coupling where step-angle accuracy must be maintained through the coupling.
Position transducer coupling in damper actuators and process control valves.
Coupling of potentiometers and synchros in position measurement and control instruments.
Three-piece general purpose jaw coupling — two metallic hubs and an elastomeric spider. Transmits torque, damps vibration, absorbs shock and accommodates misalignment. Failsafe: hub jaws engage if spider wears. Part of the PUFlex GS / GR family.
Two metallic hubs with jaw projections interlock around an elastomeric spider element. Torque is transmitted through the spider lobes in compression. The spider material and hardness determine vibration dampening, misalignment capacity and torque rating.
| Parameter | PUFlex GS (Precision) | PUFlex GR (Industrial) |
|---|---|---|
| Hub Materials | Al + Steel clamp ring | Al / Cast Iron / Steel |
| Spider Material | Polyurethane | Polyurethane |
| Shore Options | 80 / 92 / 98 Shore A | 80 / 92 / 98 Shore A |
| Max Torque | Up to 525 Nm | Up to 4,000 Nm |
| Max RPM | Up to 25,400 | Up to 16,708 |
| Backlash | Zero | Minimal |
| Primary Use | Servo, CNC, encoders | Industrial drives, pumps |
| Failsafe | Yes | Yes |
| Electrical Isolation | Yes | Yes |
| Sizes | 14 – 48 | 19 – 90 |
Jaw couplings cover the widest range of industrial applications — from precision servo drives to heavy-duty pump and conveyor systems.
PUFlex GS provides zero-backlash precision jaw coupling for servo axes and CNC feed drives.
PUFlex GR absorbs motor starting shocks and vibration in centrifugal and positive-displacement pumps.
Industrial jaw coupling absorbs shock load during starting and braking on material handling systems.
Spindle drives, tool changers, and auxiliary drives in machining centres and lathes.
Motor-to-gearbox coupling in speed reducers across all industrial sectors.
Low-vibration coupling in winding, weaving, and printing machine drives.
Cone-clamp keyless shaft-to-hub connection. No keyways, no threads, no taper required. Backlash-free, self-centering, transmits torque and axial force simultaneously. Multiple series (KTPPL 110–608) covering a wide range of shaft diameters and torques.
Double-cone clamping elements clamp simultaneously on the shaft OD and hub bore ID when screws are tightened — creating a friction-based, keyless, backlash-free connection. Non-destructive removal: screws pull the cones apart.
| Parameter | Specification |
|---|---|
| Connection Type | Double-cone friction clamp |
| Keyway Required | No |
| Backlash | Zero |
| Torsional Stiffness | Rigid |
| Load Type | Torque + Axial force |
| Self-centering | Yes |
| Removal Method | Non-destructive (integrated jack screws) |
| Material (Standard) | Steel (bright) |
| Material (Special) | Stainless Steel (KTPPL 603K) |
| Shaft Tolerance | h8 recommended |
| Series Available | KTPPL 110 to KTPPL 608 |
| Catalogue | KTPPL Keyless Clamping Elements |
KTPPL offers 21 keyless clamping element series to match every shaft diameter, torque requirement, and mounting configuration. Contact Aximotion for dimensional data and selection assistance.
| Series | Description / Notes |
|---|---|
| KTPPL 110 | Standard double-cone clamping element |
| KTPPL 130 | Medium shaft diameter range |
| KTPPL 131 | Compact medium-duty variant |
| KTPPL 132 | Medium-duty extended version |
| KTPPL 133 | Medium-high torque |
| KTPPL 134 | Heavy-duty medium shaft |
| KTPPL 135 | High torque variant |
| KTPPL 136 | Extra high torque variant |
| KTPPL 200 | Large shaft diameter range |
| KTPPL 300 | Heavy industrial range |
| KTPPL 350 | Large bore heavy duty |
| KTPPL 402 | Axial locking cone clamp |
| KTPPL 404 | Withdrawal-type cone clamp |
| KTPPL 410 | Self-releasing on disassembly |
| KTPPL 411 | Compact self-releasing |
| KTPPL 430 | Long series, high axial load |
| KTPPL 500 | External locking screw type |
| KTPPL 601 | Small shaft, miniature series |
| KTPPL 602 | Miniature medium |
| KTPPL 603 | Standard miniature cone clamp |
| KTPPL 603K | Stainless Steel — corrosion resistant |
| KTPPL 603S | Slotted shaft version |
| KTPPL 606 | Light-duty small bore |
| KTPPL 608 | Light-duty miniature |
Keyless clamping elements replace traditional key-and-keyway connections wherever backlash-free, precision or removable hub mounting is required.
Zero-backlash hub-to-shaft connection on servo motor pulleys, sprockets and gear hubs.
Rotary encoder wheels, cam discs and index tables requiring runout-free shaft mounting.
Keyless mounting of drive pulleys and sprockets — quick release for belt changes.
Mounting of output gears and sprockets to gearbox shafts without machining keyways.
Angular position adjustment of cams and eccentrics without removing the hub from the shaft.
Fit hubs onto smooth shafts without machining — ideal for field repair and retrofit situations.
Our team in Pune can help you select the right coupling type, size, hub material and spider hardness for your specific machine or automation requirement. Quotations within 24 hours.