Airtac MK Series Multi-position Locking Cylinder MK20X40H
The AirTAC MK Series Multi-position Locking Cylinder MK20X40H is a genuine MK multi-mount cylinder (double acting), 20 mm bore. Its compact square body fixes from six directions and mounts side by side to save space. It delivers about 157.1 N of push force at 0.5 MPa. A bumper cushions the impact. As an MK unit a fixed rod stops the piston rod rotating.
- TypeMulti-mount, double acting
- SeriesMK (no-rotating)
- Bore20 mm
- Push thrust @0.5 MPa157.1 N
- Operating pressure0.15 - 1.0 MPa (22 - 145 psi)
- Port sizeM5x0.8
- CushionBumper
- MagnetWithout magnet
- ThreadPT
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MK Series Multi-position Locking Cylinder MK20X40H
The MK20X40H is a genuine AirTAC multi-mount cylinder: a compact square-body actuator that fixes from six directions (front, back, left, right, top and bottom) and mounts side by side to save space. This double acting, no-rotating version has a 20 mm bore and a 40 mm stroke, giving about 157.1 N of theoretical push thrust (131.9 N on the pull side) at 0.5 MPa - suited to light clamping, positioning and stopping work. Cushioning is a bumper, and magnetic-switch slots run around the body.
As an MK-family cylinder, the MK20X40H prevents rod rotation using a fixed rod, no-rotating plate and brass bushing (typical construction), unlike the standard MD family where rotation is allowed. This SKU carries no S suffix, so it does not include the magnet. Standard working temperature is -20 to 70 C; operation up to 150 C is only possible with the optional high-temperature seal material. The meaning of the H suffix option should be confirmed from the datasheet, and we confirm dimensions and sizing on request.
Airtac MK Series Multi-position Locking Cylinder MK20X40H Technical Specifications
| Model | Airtac MK Series Multi-position Locking Cylinder MK20X40H |
|---|---|
| Type | Multi-mount cylinder, double acting |
| Series | MK (no-rotating) |
| Bore | 20 mm |
| Push thrust @0.5 MPa | 157.1 N |
| Port size | M5x0.8 (PT thread) |
| Magnet | Without magnet |
| Fluid | Air, filtered to 40 um |
|---|---|
| Operating pressure | 0.15 - 1.0 MPa (22 - 145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature | -20 to 70 C |
| Speed range | 30 - 500 mm/s |
| Cushion | Bumper |
| Mounting | Fix from 6 directions; mountable side by side |
Specifications follow the official AirTAC MD/MK multi-mount data. The front cover and piston are short, so avoid an over-long stroke. An optional high-temperature seal material extends the range to 0 to 150 C. Overall dimensions vary per stroke and allowable side-load is published as curves — ask us and we confirm from the datasheet.
How to choose
Choose the bore for thrust: at 0.5 MPa this 20 mm bore produces 157.1 N push and 131.9 N pull. Pick MK when the rod or attached plate must not rotate; pick MD when rotation is acceptable. Acting options are double acting (MK), single push (MSK), single pull (MTK), double rod (MKD) or adjustable stroke (MKJ, adding a 10/20/30 mm adjustable range). A bore 20 double acting cylinder runs up to 60 mm of stroke, so 40 mm fits well in the table - avoid over-long strokes because the short covers limit what the cylinder should carry. This SKU has no magnet; the S suffix adds one. Thread is PT as standard (G available); route side-load figures and the H option detail to us or the datasheet.
Applications
Fixture locating
Fix the body from six directions inside a machine fixture and use the 40 mm stroke to advance a locating pin; the no-rotating rod keeps the pin indexed at every cycle.
Light part hold-down
With about 157 N of push at 0.5 MPa, this 20 mm bore cylinder clamps small housings or plates during a machining or assembly step, side by side with other units to save space.
Vertical eject or lift
Mount the cylinder top or bottom fixed and use the double acting stroke to lift or eject light parts from a nest, with the non-rotating rod keeping the tool plate facing forward.
FAQ
What is the difference between the MK20X40H and the MD family?
The MK20X40H is a no-rotating cylinder: a fixed rod, plate and bushing stop the piston rod from turning, which is important when a tool or plate must stay aligned. The standard MD family of the same size allows rod rotation. Both are compact multi-mount bodies that fix from six directions.
What temperature can the MK20X40H operate at?
The standard working temperature range is -20 to 70 C. Operation up to 150 C is only possible when the cylinder is fitted with the optional high-temperature seal material, so confirm the exact configuration of this model from the datasheet before ordering for hot environments.