The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X160-20S 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. Ø40mm bore, 160mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X160-20S delivers a push force of 628 N at 0.5 MPa, making it a capable actuator for medium-duty positioning tasks. Its 20 mm rear adjusting screw allows the stroke end to be fine-tuned on the machine without swapping the cylinder, which is invaluable during commissioning or for format changeovers.
This model includes a built-in magnet, enabling direct mounting of CMSG, DMSG, or EMSG sensors for reliable end-of-stroke detection. With a 16 mm rod, PT1/4 ports, and a 21 mm air cushion, it provides smooth deceleration and a compact body length of 185 mm.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X160-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 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 | 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 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 | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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. |
|---|---|
| 40 | 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 end-stop position during initial machine setup without needing shims or custom hard stops, speeding up the integration process.
Quickly adjust the stroke end for different product sizes on a packaging or sorting line, reducing downtime between batches.
Take up mechanical play or tooling wear over time by slightly extending the effective stroke, maintaining consistent part contact.
For applications requiring more force, stepping up to the SCJ50 series provides a push force of 982 N at 0.5 MPa. If your application has a fixed, unchanging stroke, the standard SC40 fixed-stroke cylinder is a more economical choice. As a direct replacement, match an AirTAC SCJ40 with a nominal 160 mm stroke, a 20 mm adjust range, PT ports, and a magnetic piston.
Adjustable-stroke checklist
At 0.5 MPa, it generates 628 N of push force and 528 N of pull force due to the single-rod design. The maximum push force at 0.9 MPa is 1130 N.
A rear-cap screw lets you shorten the stroke end by up to 20 mm. It sets a new mechanical stop for the piston, reducing the 160 mm nominal stroke as needed without affecting force.
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