The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X275-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø40mm bore, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCJ40X275-30S is a 40mm bore, double-acting, single-rod cylinder with a 30mm rear-end stroke adjuster, offering a nominal 275mm stroke. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, with a 16mm diameter piston rod and PT1/4 ports. The integrated magnet allows direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
This tie-rod cylinder features an adjustable air cushion for smooth deceleration and a body length of 185 mm. The stroke adjustment screw provides a simple, mechanical way to fine-tune the end position on the machine, making it ideal for applications requiring precise setup or format changes without replacing the cylinder.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X275-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 275 mm |
| Stroke adjustment | Up to 30 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. |
| ×275 | Nominal (maximum) stroke length in mm. |
| -30 | 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 machine commissioning to achieve perfect alignment with mating parts, eliminating the need for shims or custom mechanical stops.
Quickly adjust the stroke end for different product sizes on a packaging or sorting line, reducing downtime between batches with a simple screw adjustment.
Compensate for tooling or gripper wear over time by incrementally adjusting the stroke end, maintaining consistent contact pressure and part engagement.
Choose the SCJ40X275-30S when you need field-adjustable stroke end positioning within a 30mm range. For higher force requirements, consider stepping up to the 50mm bore SCJ, which provides 982 N of push force at 0.5 MPa. If a fixed stroke is sufficient and cost is a primary concern, the standard SC series is a suitable alternative. For guided loads, a guided cylinder is recommended.
This model is a direct replacement for any AirTAC SCJ40X275-30S cylinder. At a 275mm stroke, ensure the rod is adequately supported against side loads; if significant lateral forces are present, an external guide rail should be used to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa, it provides 628 N of push force and 528 N of pull force. The maximum push force at the 0.9 MPa operating limit is 1130 N.
Yes, it is a direct replacement for any AirTAC SCJ40X275-30S cylinder with a magnet, basic mount, TPU seals, and PT threads. Ensure the bore, stroke, and 30mm adjust range match your existing unit.
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