The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X275-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø40mm bore, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCJ40X275-100 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, providing a 100 mm range to fine-tune the extended position without swapping the unit. With a 40 mm bore and 16 mm piston rod, it delivers 628 N of push force at 0.5 MPa, making it a versatile mid-range actuator for tasks needing on-machine stroke tweaking.
Its rear-cap adjusting screw lets you shorten the nominal 275 mm stroke by up to 100 mm, ideal for commissioning, format changes, or compensating for tooling wear. The cylinder body length (A dimension) is 185 mm, and it features an adjustable air cushion to decelerate the piston smoothly. This model uses the basic mount configuration, TPU seals, and PT ports.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X275-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 275 mm |
| Stroke adjustment | Up to 100 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. |
| -100 | 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.
Adjust the stroke end by up to 100 mm during initial machine setup to perfectly synchronize the cylinder's extended position with mating tooling or fixtures.
Quickly adapt to different product sizes on a packaging or assembly line by turning the rear screw to set a new, repeatable end stop without reprogramming.
Take up mechanical play or compensate for gradual wear on end-of-arm tooling pads or stops, maintaining precise positioning over the cylinder's service life.
Choose the SCJ40X275-100 when you need to dial in a precise stroke end on the machine. If you need more push force, stepping up to the 50 mm bore provides 982 N at 0.5 MPa; for a lighter, more compact solution, the 32 mm bore offers 402 N. Because the nominal stroke is 275 mm, ensure the rod is adequately supported against side loads—consider an external guide or switch to a guided cylinder if lateral forces are present. For a direct replacement, match the 40 mm bore, 275 mm nominal stroke, 100 mm adjust range, PT port thread, and basic mounting.
Adjustable-stroke checklist
At 0.5 MPa, this single-rod cylinder produces 628 N of push force and 528 N of pull force. The push force is greater because pressure acts on the full bore area, while pull force is reduced by the 16 mm rod cross-section.
A rear-cap screw sets the stroke end position within a 100 mm range, shortening the 275 mm nominal stroke. It is a direct mechanical adjustment, not a force or speed control. It can replace an SC of the same bore and stroke if you need field adjustability, but the SCJ body is slightly longer to house the mechanism.
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