The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X100-30S 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, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCJ40X100-30S is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly in your hands. Its rear-cap adjusting screw provides a 30 mm adjustment range, letting you dial in the exact stop position for a 100 mm nominal stroke without swapping the cylinder or adding external hard stops. With a 16 mm diameter piston rod and a push force of 628 N at 0.5 MPa, it handles moderate clamping, pressing, and positioning tasks with ease.
This model includes a built-in magnet (-S suffix), so standard CMSG/DMSG/EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The body length A is 185 mm, and the adjustable air cushion decelerates the piston smoothly at both ends. It is a genuine AirTAC component, factory-tested to a 1.5 MPa proof pressure for consistent, long-life operation in industrial automation.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X100-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 100 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. |
| ×100 | 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.
The 30 mm adjustment screw lets technicians quickly fine-tune the retract stroke end on a new assembly line without re-machining brackets or changing the cylinder, saving hours of mechanical setup time.
In a clamping fixture, the adjustable stroke can be periodically shortened to compensate for the gradual wear of a consumable pad or tooling tip, maintaining consistent clamp force without reprogramming.
For a diverting gate that handles two box sizes, the operator can adjust the cylinder's stroke end by up to 30 mm to perfectly align the pusher plate with the new product width, enabling a rapid format change.
Choose the SCJ40 bore when your application needs roughly 628 N of push force at standard shop air. If you need more force, stepping up to the SCJ50 provides 982 N of push at the same 0.5 MPa; for a lighter, more compact solution, the SCJ32 delivers 402 N. The SCJ adjustable-stroke design is the right pick over a fixed-stroke SC when you anticipate needing to tweak the end position during commissioning, after tooling wear, or for small-batch changeovers.
For a direct replacement, match this SCJ40X100-30S with another AirTAC SCJ of the same 40 mm bore, 100 mm nominal stroke, and 30 mm adjustment range, ensuring the PT port thread and built-in magnet are also specified. If your 100 mm stroke application involves any off-axis loading, consider an external guide rail or a guided cylinder to protect the rod and bearing from side wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. The pull force is lower due to the area of the 16 mm piston rod. The maximum push force at the 0.9 MPa operating limit is 1130 N.
It can fit in the same mounting space, but the SCJ body is slightly longer to house the adjusting mechanism. You can replace an SC40X100 with this SCJ40X100-30S if you need the 30 mm field-adjustable stroke feature. Ensure your mounting and porting (PT thread) match, and that you have the -S magnet if sensors are required.
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