Airtac MDD Multi-position Double Rod Cylinder MDD20X40
The AirTAC Airtac MDD Multi-position Double Rod Cylinder MDD20X40 is a genuine MD multi-mount cylinder (double rod), 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.
- TypeMulti-mount, double rod
- SeriesMD (standard)
- 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 MDD Multi-position Double Rod Cylinder MDD20X40
The AirTAC MDD20X40 is a double rod variant of the MD multi-mount cylinder: a compact square-body air cylinder with a 20 mm bore and 40 mm stroke that fixes from six directions - front, back, left, right, top and bottom. The square format lets you bolt units side by side on the same plate, saving space in dense machine layouts, and magnetic-switch slots surround the body. It runs double acting on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), delivers a theoretical push thrust of 157.1 N and a rod-side thrust of 131.9 N at 0.5 MPa, and cushions with a bumper. With rods on both ends, the 40 mm stroke can push and pull work from either side of the body.
This is a genuine AirTAC part from the MD family, the standard multi-mount series where the piston rod is free to rotate; if the application must stop rotation, choose the MK family with its no-rotating plate instead. This SKU carries no magnet, so it is supplied without switch detection - magnet versions are separate SKUs ending in S. We confirm exact dimensions, weights and side-load limits from the datasheet on request, since every value depends on the stroke.
Airtac MDD Multi-position Double Rod Cylinder MDD20X40 Technical Specifications
| Model | Airtac MDD Multi-position Double Rod Cylinder MDD20X40 |
|---|---|
| Type | Multi-mount cylinder, double rod |
| Series | MD (standard) |
| 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
Pick the bore by thrust: a 20 mm bore gives 157.1 N push and 131.9 N pull at 0.5 MPa; move to 25 mm (245.4 N push) or 32 mm (402.1 N push) for heavier work. Choose MD if rod rotation is acceptable and MK if it must be prevented. Then set the acting type: MD double acting, MSD/MSK single push, MTD/MTK single pull, MDD/MKD double rod, or MDJ/MKJ adjustable with a 10/20/30 mm range. This MDD20X40 is a 20 mm double rod, double acting unit with a 40 mm stroke, within the 60 mm limit for bore 20 - but respect the short cover, since an over-long stroke bottoms out on the bumper. This SKU has no magnet (no trailing S); select an S-suffixed model if you need switch detection. Ports are M5x0.8 at bore 20, PT thread as standard or G on request. For allowable side-load, route the check to us.
Applications
Ejecting finished parts from a die
Fitted behind a small forming die, the double rod pushes the finished part out on one side while the rear rod drives a knock-off pin, using the 40 mm stroke to clear the nest.
Synchronized work feeding from both sides
The 20 mm double rod advances two workpieces in unison - one forward, one backward - into opposing stations of a small assembly bench, mounted flush side by side along the frame.
Lift-and-lower part kicker at a gate
Mounted under a mini conveyor with the 6-direction fixing, the 40 mm stroke raises a kicker blade to divert small cartons, with the bumper cushioning the return stroke.
FAQ
Does the MDD20X40 include a magnet?
No. With no trailing S, this SKU is supplied without a magnet and cannot trigger a magnetic proximity switch. If you need switch detection, order a magnet version of the same cylinder, such as MDD20X40S, which is the identical 20 mm bore, 40 mm stroke double rod unit built with the magnet.
Why keep the stroke short on a bore 20 multi-mount cylinder?
Bore 20 units use a short cover, so strokes must stay within the table - up to 60 mm for this bore - and an over-long stroke risks the piston bottoming hard on the bumper. The 40 mm stroke here sits comfortably inside that limit. Confirm exact dimensions and allowable side-load from the datasheet before mounting.