The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X160-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø50mm bore, 160mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X160-20S is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the rear cap. With a nominal 160 mm stroke and a 20 mm adjustable range, you can dial in the exact end position during commissioning or format changeovers without adding external hard stops. The built-in magnet (-S) lets CMSG/DMSG/EMSG sensors clamp onto the tie-rod barrel for reliable end-of-stroke sensing.
At 0.5 MPa, this 50 mm bore delivers 982 N of push force and 825 N on the pull stroke, making it a capable mid-range actuator. The 20 mm rod with M16x1.5 thread and PT1/4 ports keep it compact, while the 21 mm air cushion at each end protects the piston from impact. Its body length A(SCJ) is 194 mm, slightly longer than the fixed-stroke SC version to house the adjusting mechanism.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X160-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 160 mm |
| Stroke adjustment | Up to 20 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. |
| -20 | 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.
Fine-tune the stroke end position on a new assembly line without machining custom stops. The 20 mm rear screw lets technicians dial in the exact travel needed for a pick-and-place gripper.
Adjust the cylinder stroke when a packaging machine switches between box sizes. The operator simply turns the rear screw to match the new pusher stroke, eliminating mechanical change parts.
Take up mechanical play in a clamping fixture over time. As tooling wears, the 20 mm adjustment range allows the cylinder to extend slightly further, maintaining consistent clamping force without replacing components.
Choose the SCJ50 when your application needs around 980 N of push force at standard plant pressure. If you require more force, stepping up to the SCJ63 bore provides 1559 N push at 0.5 MPa. For a lighter, more compact solution, the SCJ40 bore offers 628 N push. If your stroke is fixed and you never need to tweak the end position, the standard SC50 fixed-stroke cylinder is a simpler, lower-cost alternative.
For replacement, match this model directly: an SCJ50 with a 160 mm nominal stroke, 20 mm adjustable range, PT ports, and the -S magnet option. At this stroke length, ensure the rod is guided externally if side loads are present, or consider a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1964 N. The pull force is always lower because the rod reduces the effective piston area on the return stroke.
Yes, provided the nominal stroke, port thread (PT), and mounting match. The SCJ50 body is slightly longer (194 mm) to house the adjusting screw. You must also match the -S magnet option if your existing setup uses sensors. The adjustable stroke adds the ability to fine-tune the end position by up to 20 mm.
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