
MK Series Rotary Clamp Cylinder is listed in the pneumatic cylinders section of the Betre catalogue under the Rotary Actuator series. It is manufactured by YUEQING BETRE AUTOMATION CO., LTD. in Yueqing, Zhejiang, and supplied to automation machine builders and distributors in China and export markets.
The tables and drawings below are reproduced from the Betre product catalogue for this model.
| Bore Size(mm) | 12 | 16 | 20 | 25 | 32 | 40 | 50 | 63 | |||
| Action | Double acting | ||||||||||
| Rotary angle Note 1) | 90° ±10° | ||||||||||
| Rotary direction Note 2) | Clockwise, Counterclockwise | ||||||||||
| Rotary stroke (mm) | 7.5 | 9.5 | 15 | 19 | |||||||
| Clamp stroke (mm) | 10,20,30 | 10,20,30,50 | |||||||||
| Theoretical clamp force (N) Note 3) | 40 | 75 | 100 | 185 | 300 | 525 | 825 | 1400 | |||
| Fluid | Air | ||||||||||
| Proof pressure | 1.5 MPa | ||||||||||
| Operating pressure range | 0.1 to 1 MPa | 0.1 to 0.6Mpa Note4) | |||||||||
| Ambient and fluid temperature |
Without auto switch: –10 to 70°C (No freezing) With auto switch: –10 to 60°C (No freezing) |
||||||||||
| Lubrication | Non-lube | ||||||||||
| Piping port size | M5 x 0.8 | Rc1/8, NPT1/8,G1/8 | Rc1/4, NPT1/4,G1/4 | ||||||||
| Mounting | Through-hole/Both ends tapped common, Head flange | ||||||||||
| Cushion | Rubber bumper | ||||||||||
| Stroke length tolerance | +0.6/–0.4 | ||||||||||
| Piston speed Note 5) | 50 to 200 mm/s | ||||||||||
| Non-rotating accuracy (Clamp part) Note 1) | ±1.4° | ±1.2° | ±0.9° | ±0.7° | |||||||


| Model | A | B | C | D | E | F | H | øYh9 | Rod state | Clamp stroke | |||||
| 10mm | 20mm | 30mm | |||||||||||||
| Q | R | Q | R | Q | R | ||||||||||
| MKB12-Z | 25 | 32 | 15.5 | 5 | M3 x 0.5 | 5.5 | 6 |
11(0~ –0.043) |
Retracted | 68 | 45.5 | 88 | 55.5 | 108 | 65.5 |
| Extended | 85.5 | 115.5 | 145.5 | ||||||||||||
| MKB16-Z | 29 | 38 | 20 | 7 | M5 x 0.8 | 6.5 | 8 |
14(0~ –0.043) |
Retracted | 68 | 88 | 108 | |||
| Extended | 85.5 | 115.5 | 145.5 | ||||||||||||
| Model | I | N | O | P | U | V | Rod state | M | ||
| Clamp stroke | ||||||||||
| 10mm | 20mm | 30mm | ||||||||
| MKB12-Z | 4 | 8 | 29 | 20 | 8 | M3 x 0.5 | Retracted | 28.5 | 38.5 | 48.5 |
| Extended | 46 | 66 | 86 | |||||||
| MKB16-Z | 5 | 11 | 36 | 25 | 11 | M4 x 0.7 | Retracted | 31.5 | 41.5 | 51.5 |
| Extended | 49 | 69 | 89 | |||||||

| Model | A | B | C | E | F | G | øYh9 | S | T | Rod state | Clamp stroke | |||||
| 10mm | 20mm | 30mm | ||||||||||||||
| Q | R | Q | R | Q | R | |||||||||||
| MKB20-Z | 36 | 47 | 36 | 35.5 | 18 | 17.9 | 18(0~–0.043) | 28 | 9 | Retracted | 92.5 | 72 | 112.5 | 82 | 132.5 | 92 |
| Extended | 112 | 142 | 172 | |||||||||||||
| MKB25-Z | 40 | 52 | 40 | 40.5 | 21 | 22.5 | 23(0~–0.052) | 27.5 | 10.5 | Retracted | 93.5 | 73 | 113.5 | 83 | 133.5 | 93 |
| Extended | 113 | 143 | 173 | |||||||||||||
| Model | Rod state | M | ||
| Clamp stroke | ||||
| 10mm | 20mm | 30mm | ||
| MKB12-Z | Retracted | 32 | 42 | 52 |
| Extended | 51.5 | 71.5 | 91.5 | |
| MKB16-Z | Retracted | 32 | 42 | 52 |
| Extended | 51.5 | 71.5 | 91.5 | |

| Model | A | B | C | D | E | F | G | H | I | J | K | L | S | T | W | X | øYh9 | Z | AA | AB | ØAC | AE | |
| MKB32-Z | 45 | 49.5 | 34 | 14 | M10 x 1.5 | 12 | 29.5 | 16 | 9 | 7 | M6x1.0 | 10 | 31.5 | 10.5 | 14 | 3 | 30(0~–0.062) | 6.5 | 4.5 | 1 | 5.5 | 1/8 | |
| MKB40-Z | 52 | 57 | 40 | 14 | M10 x 1.5 | 12 | 29.5 | 16 | 9 | 7 | M6x1.0 | 10 | 29 | 9 | 15 | 3 | 30(0~–0.062) | 6.5 | 5 | 1 | 5.5 | 1/8 | |
| MKB50-Z | 64 | 71 | 50 | 17 | M12 x 1.75 | 15 | 36.5 | 20 | 11 | 8 | M8x1.25 | 14 | 34 | 11.5 | 19 | 3.5 | 37(0~–0.062) | 7.5 | 7 | 1 | 6.6 | 1/4 | |
| MKB63-Z | 77 | 84 | 60 | 17 | M12 x 1.75 | 15 | 47.5 | 20 | 14 | 10.5 | M10x1.5 | 18 | 34.5 | 10.5 | 19 | 3.5 | 48(0~–0.062) | 7.5 | 7 | 1.4 | 9 | 1/4 | |
| Model | Rod state | Clamp stroke | |||||||
| 10mm | 20mm | 30mm | 50mm | ||||||
| Q | R | Q | R | Q | R | Q | R | ||
| MKB32-Z | Retracted | 113.5 | 81.5 | 133.5 | 91.5 | 153.5 | 101.5 | 193.5 | 121.5 |
| Extended | 138.5 | 168.5 | 198.5 | 258.5 | |||||
| MKB40-Z | Retracted | 114.5 | 75 | 134.5 | 85 | 154.5 | 95 | 194.5 | 115 |
| Extended | 139.5 | 169.5 | 199.5 | 259.5 | |||||
| MKB50-Z | Retracted | 132 | 86.5 | 152 | 96.5 | 172 | 106.5 | 212 | 126.5 |
| Extended | 161 | 191 | 221 | 281 | |||||
| MKB63-Z | Retracted | 135 | 90 | 155 | 100 | ||||
Other parts from the same Rotary Actuator range, usually quoted alongside this one.
MK Series Rotary Clamp Cylinder sits in the Pneumatic Cylinders category of the Betre catalogue, under the Rotary Actuator series.
Yes. We offer OEM and ODM services according to customers' requirements and we make our own moulds and tooling.
Email [email protected] or [email protected] with the model code and quantity, or call +86-577-61712130. Our contact person is April Huang.
Yes. We do the inspection for all the products before delivery.
Our products sell all over China and in the international markets of European, North and South American countries, Southeast Asia and Oceania.
Send the quantity and any port thread or bore requirement, and we will confirm price and lead time.