The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X40-40S 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, 40mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X40-40S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering a push force of 982 N at 0.5 MPa. The rear-cap adjusting screw provides a 40 mm range to fine-tune the stroke end position, making it ideal for applications requiring precise end-stop setting during commissioning or format changes.
This model features a 20 mm diameter piston rod and an M16x1.5 rod thread for robust connection. The built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors on the tie-rod barrel for reliable end-of-stroke detection, eliminating the need for external brackets.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X40-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 40 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. |
| ×40 | 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.
Allows technicians to precisely dial in the actuator end-stop during initial machine build and testing, accommodating minor assembly variations.
Quickly adjust the stroke end for different product sizes on a packaging line without mechanical modifications, reducing downtime between batches.
The 40 mm screw adjustment can be used to take up mechanical play or compensate for tooling wear over time, maintaining consistent process quality.
Select the SCJ50X40-40S when you need to dial in a specific stroke end within a 40 mm window without swapping the cylinder. For higher force requirements, step up to the 63 mm bore which provides 1559 N of push force at 0.5 MPa. If your application requires a fixed, non-adjustable stroke, the standard SC series is a more cost-effective choice. This unit is a direct replacement for an AirTAC SCJ50X40-40S cylinder, matching the 50 mm bore, 40 mm nominal stroke, 40 mm adjust range, PT port thread, and integrated magnet.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. The push force is greater because it acts on the full 50 mm bore area, while the pull force is reduced by the 20 mm rod cross-section.
The -40 suffix indicates a 40 mm adjustment range for the rear screw. This screw acts as a movable end-stop, allowing you to shorten the 40 mm nominal stroke by up to 40 mm to achieve the exact stroke length needed.
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