Uses an element (polyurethane elastomer) with a hardness of 97 JIS A and a tight-fit construction designed for a pre-compressed shape, so the coupling can be used without backlash.It can be used at high torque and a wide range of motors, from simple servos to general-purpose motors.
Structure and Materials
Pilot Bore
Key/Set Screw Type
Clamp Type
[Specifications]
| Model | Torque | Misalignment | Max. rotation speed ［min-1］ | Static torsional stiffness ［N・m/rad］ | Radial stiffness ［N/mm］ | Moment of inertia ［kg・m2］ | Mass ［kg］ | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Nominal ［N・m］ | Max. ［N・m］ | Parallel ［mm］ | Angular ［°］ | Axial ［mm］ | ||||||
| ALS-014-R | 2 | 4 | 0.10 | 1 | 0 to ＋0.6 | 34100 | 21 | 380 | 1.91×10-7 | 0.007 |
| ALS-020-R | 5 | 10 | 0.10 | 1 | 0 to ＋0.8 | 23800 | 43 | 400 | 1.08×10-6 | 0.018 |
| ALS-030-R | 12.5 | 25 | 0.10 | 1 | 0 to ＋1.0 | 15900 | 136 | 650 | 6.25×10-6 | 0.047 |
| ALS-040-R | 17 | 34 | 0.10 | 1 | 0 to ＋1.2 | 11900 | 1550 | 1700 | 3.87×10-5 | 0.15 |
| ALS-055-R | 60 | 120 | 0.10 | 1 | 0 to ＋1.4 | 8700 | 2000 | 1350 | 1.66×10-4 | 0.35 |
| ALS-065-R | 160 | 320 | 0.10 | 1 | 0 to ＋1.5 | 7400 | 3100 | 1400 | 3.57×10-4 | 0.51 |
| ALS-080-R | 325 | 650 | 0.10 | 1 | 0 to ＋1.8 | 6000 | 6000 | 1710 | 1.06×10-3 | 1.01 |
| ALS-095-R | 450 | 900 | 0.10 | 1 | －0.5 to ＋2.0 | 5000 | 10000 | 4200 | 2.24×10-3 | 1.50 |
| ALS-105-R | 525 | 1050 | 0.15 | 1 | －0.9 to ＋2.0 | 4500 | 12000 | 5000 | 3.72×10-3 | 2.05 |
*Axial displacement of the ALS-014-R to ALS-080-R is not allowed in the negative direction.
*Max. rotation speed does not take into account dynamic balance.
*Stiffness values given are from measurements taken at 20℃.
*The moment of inertia and mass are measured for the maximum bore diameter.
[Dimensions]
Unit ［mm］
| Model | d1, d2 | D | L | L1, L2 | E | S | C | ||
|---|---|---|---|---|---|---|---|---|---|
| Pilot bore | Min. | Max. | |||||||
| ALS-014-R | 3 | 3 | 6.5 | 14 | 22 | 7 | 8 | 1 | 3.5 |
| ALS-020-R | 4 | 4 | 9.6 | 20 | 30 | 10 | 10 | 1 | 5 |
| ALS-030-R | 5 | 6 | 14 | 30 | 35 | 11 | 13 | 1.5 | 5.5 |
| ALS-040-R | 5 | 8 | 22 | 40 | 66 | 25 | 16 | 2 | 12.5 |
| ALS-055-R | 5 | 10 | 28 | 55 | 78 | 30 | 18 | 2 | 15 |
| ALS-065-R | 5 | 14 | 38 | 65 | 90 | 35 | 20 | 2.5 | 17.5 |
| ALS-080-R | 10 | 19 | 45 | 80 | 114 | 45 | 24 | 3 | 22.5 |
| ALS-095-R | 8 | 19 | 55 | 95 | 126 | 50 | 26 | 3 | 25 |
| ALS-105-R | 10 | 19 | 60 | 105 | 140 | 56 | 28 | 3.5 | 28 |
*"Pilot bore" refers to center processing.
[Standard bore diameter]
Unit ［mm］
| Model | Standard bore diameter d1, d2 ［mm］ | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 5 | 6 | 6.35 | 8 | 9 | 9.525 | 10 | 11 | 12 | 14 | 15 | 16 | 18 | 19 | 20 | 24 | 25 | 28 | 30 | 32 | 35 | 38 | 40 | 42 | 45 | 50 | 55 | 60 | |
| ALS-014-R | ● | ● | ● | ● | ● | |||||||||||||||||||||||||
| ALS-020-R | ● | ● | ● | ● | ● | ● | ||||||||||||||||||||||||
| ALS-030-R | ● | ● | ● | ● | ● | ● | ● | |||||||||||||||||||||||
| ALS-040-R | ● | ● | ● | ● | ● | ● | ● | ● | ||||||||||||||||||||||
| ALS-055-R | ● | ● | ● | ● | ● | ● | ● | ● | ||||||||||||||||||||||
| ALS-065-R | ● | ● | ● | ● | ● | ● | ● | |||||||||||||||||||||||
| ALS-080-R | ● | ● | ● | ● | ● | ● | ● | |||||||||||||||||||||||
| ALS-095-R | ● | ● | ● | ● | ● | ● | ||||||||||||||||||||||||
| ALS-105-R | ● | ● | ● | ● | ● | ● | ● | |||||||||||||||||||||||
*The bore diameters marked with ● are supported as standard bore diameter.
*ø11 and below have no keyway; ø12 and above can be processed for old JIS standards, new JIS standards, and new standard motors.
*The only standard processing of bore diameters of the ALS-095 and ALS-105 are for new JIS standards and new standard motors.
ALS R Types (clamp types)
[Specifications]
Unit ［mm］
| Model | Misalignment | Max. rotation speed ［min-1］ | Static torsional stiffness ［N・m/rad］ | Radial stiffness ［N/mm］ | Moment of inertia ［kg・m2］ | Mass ［kg］ | ||
|---|---|---|---|---|---|---|---|---|
| Parallel ［mm］ | Angular ［°］ | Axial ［mm］ | ||||||
| ALS-014-R | 0.1 | 1 | 0 to ＋0.6 | 10000 | 21 | 380 | 1.98×10-7 | 0.007 |
| ALS-020-R | 0.1 | 1 | 0 to ＋0.8 | 10000 | 43 | 400 | 1.09×10-6 | 0.019 |
| ALS-030-R | 0.1 | 1 | 0 to ＋1.0 | 10000 | 136 | 650 | 6.19×10-6 | 0.045 |
| ALS-040-R | 0.1 | 1 | 0 to ＋1.2 | 10000 | 1550 | 1700 | 4.01×10-5 | 0.16 |
| ALS-055-R | 0.1 | 1 | 0 to ＋1.4 | 7000 | 2000 | 1350 | 1.63×10-4 | 0.34 |
| ALS-065-R | 0.1 | 1 | 0 to ＋1.5 | 5900 | 3100 | 1400 | 3.69×10-4 | 0.54 |
| ALS-080-R | 0.1 | 1 | 0 to ＋1.8 | 4800 | 6000 | 1710 | 1.04×10-3 | 1.00 |
*Axial displacement is not allowed in the negative direction.
*Max. rotation speed does not take into account dynamic balance.
*Stiffness values given are from measurements taken at 20℃.
*The moment of inertia and mass are measured for the maximum bore diameter.
[Dimensions]
Unit ［mm］
| Model | d1, d2 | D | DB | L | L1, L2 | E | S | B | G | M | Tightening torque ［N・m］ | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min. | Max. | |||||||||||
| ALS-014-R | 3 | 6 | 14 | 16.1 | 22 | 7 | 8 | 1 | 3.5 | 4.8 | 1-M2 | 0.4 |
| ALS-020-R | 4 | 8 | 20 | 20 | 30 | 10 | 10 | 1 | 5 | 6.5 | 1-M2.5 | 1 |
| ALS-030-R | 6 | 14 | 30 | 30 | 35 | 11 | 13 | 1.5 | 5.5 | 10.5 | 1-M3 | 1.5 |
| ALS-040-R | 8 | 20 | 40 | 43.2 | 66 | 25 | 16 | 2 | 12.5 | 15 | 1-M5 | 7 |
| ALS-055-R | 10 | 28 | 55 | 55 | 78 | 30 | 18 | 2 | 10.5 | 20 | 1-M6 | 14 |
| ALS-065-R | 14 | 35 | 65 | 69.8 | 90 | 35 | 20 | 2.5 | 11.5 | 24.5 | 1-M8 | 30 |
| ALS-080-R | 19 | 45 | 80 | 80 | 114 | 45 | 24 | 3 | 11.5 | 30 | 1-M8 | 30 |
*The øDB value is measured assuming that the head of the clamping bolt is larger than the external diameter of the hub.
*The nominal diameter for the clamping bolt M is equal to the quantity minus the nominal diameter of the screw threads, where the quantity is for a hub on one side.
Standard bore diameter and allowable transmission torque
| Model | Standard bore diameters d1, d2 ［mm］ and rated transmission torque ［N・m］ | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 5 | 6 | 6.35 | 7 | 8 | 10 | 11 | 12 | 14 | 15 | 16 | 18 | 19 | 20 | 22 | 24 | 25 | 28 | 30 | 35 | 42 | |
| ALS-014-R | 0.31 | 0.42 | 0.54 | 0.65 | |||||||||||||||||||
| ALS-020-R | 1.2 | 1.6 | 2.1 | 2.2 | 2.6 | 3.0 | |||||||||||||||||
| ALS-030-R | 2.0 | 2.2 | 3.4 | 4.7 | 5.4 | 6.0 | 7.4 | ||||||||||||||||
| ALS-040-R | 8 | 16 | 23 | 31 | 34 | 34 | 34 | ||||||||||||||||
| ALS-055-R | 38 | 41 | 48 | 51 | 54 | 61 | 67 | 71 | 80 | ||||||||||||||
| ALS-065-R | 61 | 68 | 75 | 79 | 89 | 96 | 114 | ||||||||||||||||
| ALS-080-R | 108 | 121 | 151 | 194 | |||||||||||||||||||
*Bore diameters whose fields contain numbers are supported as the standard bore diameters.
*Bore diameters whose fields contain numbers are restricted in their rated transmission torque by the holding power of the shaft connection component. The numbers indicate the rated transmission torque value [N·m].
*The recommended processing tolerance for paired mounting shafts is the h7 class. However, for a shaft diameter of ø35, the tolerance is －0.025 to ＋0.010.
*Bore diameters between the minimum and maximums shown in the dimensions table are compatible, but bore diameters other than those shown in the above table require other arrangements. Contact Miki Pulley for details.
[Element]
Unit ［mm］
| Model | F | R1 | R2 | K | A |
|---|---|---|---|---|---|
| ALS-014-R-EL | 6.2 | 3.5 | -- | 2.5 | 1.2 |
| ALS-020-R-EL | 8.2 | 6.2 | -- | 3.4 | 1.4 |
| ALS-030-R-EL | 10.2 | 8.5 | -- | 4 | 2.2 |
| ALS-040-R-EL | 12 | 18 | -- | 4.5 | 3 |
| ALS-055-R-EL | 14 | 24 | -- | 5.5 | 3 |
| ALS-065-R-EL | 15 | 30 | -- | 5.5 | 4 |
| ALS-080-R-EL | 18 | 37 | 15 | 7 | 4 |
| ALS-095-R-EL | 20 | 43 | 20 | 8 | 4 |
| ALS-105-R-EL | 21 | 50 | 20 | 8.5 | 4 |
[Standard Hole-drilling Standards]
Unit ［mm］
| Models compliant with the old JIS standards (Class 2) | Models compliant with the new JIS standards | Models compliant with the new motor standards | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal bore diameter | Bore diameter (d1, d2) | Keyway width (W1, W2) | Keyway height (T1, T2) | Set screw hole (M) | Nominal bore diameter | Bore diameter (d1, d2) | Keyway width (W1, W2) | Keyway height (T1, T2) | Set screw hole (M) | Nominal bore diameter | Bore diameter (d1, d2) | Keyway width (W1, W2) | Keyway height (T1, T2) | Set screw hole (M) |
| Tolerance | H7, H8 | E9 | +0.30 | - | Tolerance | H7 | H9 | +0.30 | - | Tolerance | G7, F7 | H9 | +0.30 | - |
| 3 | 3+0.0180 | - | - | 1-M3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 4 | 4+0.0180 | - | - | 2-M3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 5 | 5+0.0180 | - | - | 2-M3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 6 | 6+0.0180 | - | - | 2-M4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 6.35 | 6.35+0.0220 | - | - | 2-M4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 7 | 7+0.0220 | - | - | 2-M4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 8 | 8+0.0220 | - | - | 2-M4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 9 | 9+0.0220 | - | - | 2-M4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 9.525 | 9.525+0.0220 | - | - | 2-M4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 10 | 10+0.0220 | - | - | 2-M4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 11 | 11+0.0180 | - | - | 2-M4 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 12 | 12+0.0180 | 4+0.050+0.020 | 13.5 | 2-M4 | 12H | 12+0.0180 | 4+0.0300 | 13.8 | 2-M4 | -- | -- | -- | -- | -- |
| 14 | 14+0.0180 | 5+0.050+0.020 | 16.0 | 2-M4 | 14H | 14+0.0180 | 5+0.0300 | 16.3 | 2-M4 | 14N | 14+0.024+0.006 | 5+0.0300 | 16.3 | 2-M4 |
| 15 | 15+0.0180 | 5+0.050+0.020 | 17.0 | 2-M4 | 15H | 15+0.0180 | 5+0.0300 | 17.3 | 2-M4 | -- | -- | -- | -- | -- |
| 16 | 16+0.0180 | 5+0.050+0.020 | 18.0 | 2-M4 | 16H | 16+0.0180 | 5+0.0300 | 18.3 | 2-M4 | -- | -- | -- | -- | -- |
| 17 | 17+0.0180 | 5+0.050+0.020 | 19.0 | 2-M4 | 17H | 17+0.0180 | 5+0.0300 | 19.3 | 2-M4 | -- | -- | -- | -- | -- |
| 18 | 18+0.0180 | 5+0.050+0.020 | 20.0 | 2-M4 | 18H | 18+0.0180 | 6+0.0300 | 20.8 | 2-M5 | -- | -- | -- | -- | -- |
| 19 | 19+0.0210 | 5+0.050+0.020 | 21.0 | 2-M4 | 19H | 19+0.0210 | 6+0.0300 | 21.8 | 2-M5 | 19N | 19+0.028+0.007 | 6+0.0300 | 21.8 | 2-M5 |
| 20 | 20+0.0210 | 5+0.050+0.020 | 22.0 | 2-M4 | 20H | 20+0.0210 | 6+0.0300 | 22.8 | 2-M5 | -- | -- | -- | -- | -- |
| 22 | 22+0.0210 | 7+0.061+0.025 | 25.0 | 2-M6 | 22H | 22+0.0210 | 6+0.0300 | 24.8 | 2-M5 | -- | -- | -- | -- | -- |
| 24 | 24+0.0210 | 7+0.061+0.025 | 27.0 | 2-M6 | 24H | 24+0.0210 | 8+0.0360 | 27.3 | 2-M6 | 24N | 24+0.028+0.007 | 8+0.0360 | 27.3 | 2-M6 |
| 25 | 25+0.0210 | 7+0.061+0.025 | 28.0 | 2-M6 | 25H | 25+0.0210 | 8+0.0360 | 28.3 | 2-M6 | -- | -- | -- | -- | -- |
| 28 | 28+0.0210 | 7+0.061+0.025 | 31.0 | 2-M6 | 28H | 28+0.0210 | 8+0.0360 | 31.3 | 2-M6 | 28N | 28+0.028+0.007 | 8+0.0360 | 31.3 | 2-M6 |
| 30 | 30+0.0210 | 7+0.061+0.025 | 33.0 | 2-M6 | 30H | 30+0.0210 | 8+0.0360 | 33.3 | 2-M6 | -- | -- | -- | -- | -- |
| 32 | 32+0.0250 | 10+0.061+0.025 | 35.5 | 2-M8 | 32H | 32+0.0250 | 10+0.0360 | 35.3 | 2-M8 | -- | -- | -- | -- | -- |
| 35 | 35+0.0250 | 10+0.061+0.025 | 38.5 | 2-M8 | 35H | 35+0.0250 | 10+0.0360 | 38.3 | 2-M8 | -- | -- | -- | -- | -- |
| 38 | 38+0.0250 | 10+0.061+0.025 | 41.5 | 2-M8 | 38H | 38+0.0250 | 10+0.0360 | 41.3 | 2-M8 | 38N | 38+0.050+0.025 | 10+0.0360 | 41.3 | 2-M8 |
| 40 | 40+0.0250 | 10+0.061+0.025 | 43.5 | 2-M8 | 40H | 40+0.0250 | 12+0.0430 | 43.3 | 2-M8 | -- | -- | -- | -- | -- |
| 42 | 42+0.0250 | 12+0.075+0.032 | 45.5 | 2-M8 | 42H | 42+0.0250 | 12+0.0430 | 45.3 | 2-M8 | 42N | 42+0.050+0.025 | 12+0.0430 | 45.3 | 2-M8 |
| 45 | 45+0.0250 | 12+0.075+0.032 | 48.5 | 2-M8 | 45H | 45+0.0250 | 14+0.0430 | 48.8 | 2-M10 | -- | -- | -- | -- | -- |
| 48 | 48+0.0250 | 12+0.075+0.032 | 51.5 | 2-M8 | 48H | 48+0.0250 | 14+0.0430 | 51.8 | 2-M10 | 48N | 48+0.050+0.025 | 14+0.0430 | 51.8 | 2-M10 |
| 50 | 50+0.0250 | 12+0.075+0.032 | 53.5 | 2-M8 | 50H | 50+0.0250 | 14+0.0430 | 53.8 | 2-M10 | -- | -- | -- | -- | -- |
| 55 | 55+0.0300 | 15+0.075+0.032 | 60.0 | 2-M10 | 55H | 55+0.0300 | 16+0.0430 | 59.3 | 2-M10 | 55N | 55+0.060+0.030 | 16+0.0430 | 59.3 | 2-M10 |
| 56 | 56+0.0300 | 15+0.075+0.032 | 61.0 | 2-M10 | 56H | 56+0.0300 | 16+0.0430 | 60.3 | 2-M10 | -- | -- | -- | -- | -- |
| 60 | 60+0.0300 | 15+0.075+0.032 | 65.0 | 2-M10 | 60H | 60+0.0300 | 18+0.0430 | 64.4 | 2-M10 | 60N | 60+0.060+0.030 | 18+0.0430 | 64.4 | 2-M10 |
*Tolerance will be h8 class for hole diameter equal to or less than ø10 mm.
*The set screw size is M3 for ALS-014.
[Distance from set screw edge]
| Model | ALS-014 | ALS-020 | ALS-030 | ALS-040 | ALS-055 | ALS-065 | ALS-080 | ALS-095 | ALS-105 |
|---|---|---|---|---|---|---|---|---|---|
| Distance from set screw edge C ［mm］ | 3.5 | 5 | 5.5 | 12.5 | 15 | 17.5 | 22.5 | 25 | 28 |
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