The AirTAC SDAT double acting multi-position cylinder SDAT50X40X35 is a genuine COMPACT duplex cylinder (Ø50mm bore) built from two stacked piston sections of 0 mm and 0 mm. Switching the two chambers gives fixed rod stops at 0, 0 and 0 mm — three repeatable positions from a single actuator.
The SDAT50X40X50X35 stacks two piston sections in one compact body to produce dwell points at 0, 40, and 75 mm - a triple-stop actuator that fits where two separate cylinders would not. Chamber switching does the positioning, so no servo axis or bolt-on end stop is needed.
Because output depends on one piston face only, this model behaves like a 50 mm SDA: 981.7 N push and 824.7 N pull at 0.5 MPa. Its 20 mm rod ends in a female M10x1.5 thread, air enters through PT1/4 ports, and a fixed NBR bumper - not an adjustable cushion - absorbs end shock.
| Model | Airtac SDAT double acting multi-position cylinder SDAT50X40X35 |
|---|---|
| Series | SDAT compact duplex (multi-position) cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 0 / 0 mm |
| Fixed positions | 0 / 0 / 0 mm |
| Port size | PT1/4 |
| Rod end thread | M10×1.5 F / M18×1.5 male (B) |
| Acting type | Double acting, duplex |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Fixed NBR bumper |
| Stroke rule | Stroke 1 + Stroke 2 ≤ standard max |
Stroke 1 + Stroke 2 must not exceed the standard stroke maximum for the bore. Confirm the exact stop sequence against the AirTAC SDAT datasheet before wiring the valves.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Force is set by the single piston area (same as an SDA of this bore) — the duplex design adds positions, not thrust. Actual usable force is lower than theoretical.
| SDAT | Compact duplex (multi-position) cylinder. |
|---|---|
| 50 | Bore size in mm. |
| ×0 | Stroke 1 (first section) in mm. |
| ×0 | Stroke 2 (second section) in mm. |
| S / B | S = magnet; B = male-thread rod (both optional). |
Thread: PT standard. Related: SDAW (duplex-end multi-position), SDA (single position), SDAD (double rod), SDAJ (adjustable stroke).
In a tote handling cell, the 75 mm total travel lifts boxes onto one of two shelf levels or parks low, using the 0/40/75 mm stops to match three rack heights.
A warehouse conveyor junction swings its gate to three detent angles with one actuator, the 981.7 N push at 0.5 MPa handling loaded pallet traffic.
A packaging machine pre-folds minor flaps at 40 mm, major flaps at 75 mm, and retracts to clear product infeed - three actions from a single 50 mm bore unit.
The 0.5 MPa push figure here is 981.7 N. Loads under roughly 600 N can drop to the 40 mm bore (628.3 N); demands beyond 1500 N call for the 63 mm bore at 1558.6 N. Check bore 50, S1=40, S2=35, PT1/4 ports, rod thread, and the magnet option.
Remember two solenoid lines drive the chamber combinations for all three stops. Held positions require continuous pressure - centred valves or a supply loss release the load, so fit an external holding device where safety demands it. Operation is rated 30-500 mm/s.
Quick checklist
It stops at 0, 40, and 75 mm. Thrust equals one 50 mm piston: 981.7 N push and 824.7 N pull at 0.5 MPa, 1374.4 N push at 0.7 MPa, and about 200 kgf maximum push at 1.0 MPa. The duplex stacking never multiplies force.
The first piston section fixes the 40 mm point; pressurising the second section as well drives the rod to 75 mm. Exhausting everything returns to 0 mm. Because each dwell needs a specific chamber pattern, your valve manifold must supply two independent solenoid circuits.
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