The AirTAC Airtac SC40 Standard Cylinder SC40X900LB is a genuine double-acting standard air cylinder with a Ø40mm bore and 900mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X900LB is a double-acting tie-rod cylinder delivering 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa). Its 40 mm bore houses a 16 mm diameter piston rod with M12x1.25 male threads, and the 900 mm stroke suits long-reach material transfer or pusher stations.
This model includes the LB foot mounting bracket (F-SC40LB) for rigid axial surface installation. The body length A is 142 mm, giving a total extended length of approximately 1042 mm. Adjustable air cushioning at both ends decelerates the piston over a 21 mm cushion length to reduce end-of-stroke impact.
| Model | Airtac SC40 Standard Cylinder SC40X900LB |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 900 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SC series datasheet. Operating pressure 0.15–1.0 MPa, proof pressure 1.5 MPa, temperature −20 to +70 °C. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (approx.) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SC | Standard tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×900 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: SCD (double rod), SCJ (adjustable stroke), SCT (multi-position). Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
The 900 mm stroke moves components between distant conveyor lanes or workstations, with LB feet securing the cylinder to a machine bed for stable linear actuation.
Pushes cartons or trays off a packaging line onto a perpendicular take-away conveyor. The 628 N force at 0.5 MPa handles moderate-weight packaged goods reliably.
Operates a diverter gate in a chute or sorting system. The adjustable cushion softens the gate's end-of-travel impact, reducing noise and mechanical wear.
For applications needing more force, step up to the 50 mm bore SC50 series which provides 982 N push at 0.5 MPa. If space is tight and less force is acceptable, the 32 mm bore SC32 offers 402 N. At 900 mm stroke, the 16 mm rod is relatively slender—ensure side loads are minimal or add an external linear guide to prevent rod bending and premature bearing wear.
To replace an existing cylinder, match five points: bore (40 mm), stroke (900 mm), port thread (PT1/4), LB foot mounting accessory, and confirm whether a magnet (-S) is needed. The SC series is a tie-rod design and is not dimensionally interchangeable with ISO 15552 profile cylinders.
Quick checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N. The theoretical maximum at 1.0 MPa is 128 kgf.
No. The SC40X900LB is a double-acting cylinder and does not hold position when air pressure is exhausted or the directional valve is centered. For load holding without live pressure, use an external rod lock, a pilot-operated check valve, or a mechanical brake.
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