The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X160-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø50mm bore, 160mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X160-40 is a 50 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap screw provides up to 40 mm of stroke shortening, letting you fine-tune the end position for commissioning, format changes, or wear take-up without swapping the cylinder. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa, operating on filtered air from 0.15 to 1.0 MPa.
This tie-rod cylinder uses a 20 mm diameter piston rod with an M16x1.5 rod thread and PT1/4 ports. The standard air cushion is 21 mm long, and the SCJ body length for this bore is 194 mm. With a maximum standard stroke of 1200 mm, this 160 mm stroke model is well within the standard range and suits tasks where the stroke end needs on-machine adjustment.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X160-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 160 mm |
| Stroke adjustment | Up to 40 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×160 | Nominal (maximum) stroke length in mm. |
| -40 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
The 40 mm adjusting screw allows technicians to dial in the exact stroke end position during machine commissioning without needing to swap cylinders or fabricate external hard stops.
On packaging or assembly lines running multiple product sizes, the adjustable stroke lets operators quickly change the actuator's end position for different box heights or part dimensions.
In clamping or pressing applications, the stroke can be incrementally shortened over time to compensate for tooling or gripper pad wear, maintaining consistent contact force.
Choose the SCJ50X160-40 when you need a 50 mm bore cylinder with a 160 mm nominal stroke and the ability to shorten the stroke end by up to 40 mm. If your force requirement is lower, stepping down to a 40 mm bore reduces push force to 628 N at 0.5 MPa; for higher force, a 63 mm bore provides 1559 N. This adjustable-stroke model is ideal for applications where the final stroke length is determined during setup. If your stroke is fixed and never needs field adjustment, the standard SC50X160 is a simpler, cost-effective alternative.
For a direct replacement, match the 50 mm bore, 160 mm nominal stroke, 40 mm adjust range, PT port thread, and basic mounting. If you need position sensing, order the SCJ50X160-40S for a built-in magnet. For pivoting motion, the TC centre trunnion mount with TCM1 bracket is available; use the F-SC50TC accessory code.
Adjustable-stroke checklist
At 0.5 MPa, this 50 mm bore cylinder produces 982 N of push force and 825 N of pull force. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 2000 N. The push force is higher than the pull force because the single piston rod reduces the effective area on the return stroke.
No. The rear adjusting screw only sets the stroke end position; it does not lock the piston or hold a load. If air pressure is lost or the valve is centred, the piston can drift. For load holding without live pressure, you must add an external rod brake, mechanical lock, or pilot-operated check valve.
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