The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X400-40S 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. Ø100mm bore, 400mm nominal stroke, PT1/2 ports and adjustable end cushioning.
The SCJ100X400-40S is a double-acting, single-rod pneumatic cylinder from AirTAC's SCJ series, featuring a rear-cap adjusting screw that provides up to 40 mm of field-adjustable stroke-end reduction. This allows machine builders to fine-tune the piston's end position without changing the cylinder or adding external hard stops, making it ideal for commissioning, format changeovers, and wear compensation. With a 100 mm bore, it delivers a substantial 3927 N of push force at 0.5 MPa and 7068 N at the maximum operating pressure of 0.9 MPa.
The cylinder body length A(SCJ) is 245 mm, and it uses a 25 mm diameter piston rod with an M20x1.5 thread. The PT1/2 port and integrated adjustable air cushion ensure smooth deceleration at stroke end. The built-in magnet, designated by the 'S' suffix, allows for direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors on the barrel for contactless position sensing. This model is a genuine AirTAC component, engineered for reliable performance in demanding automation tasks.
| Model | Airtac SCJ100 Standard Cylinder SCJ100X400-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 400 mm |
| Stroke adjustment | Up to 40 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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, 29 mm |
| Max stroke | Up to 1500 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 | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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. |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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.
Fine-tune the 400mm stroke end position by up to 40mm during machine commissioning without swapping cylinders. The adjusting screw allows rapid, precise alignment with mating tooling or fixtures.
Quickly adapt a packaging or material handling station to a new product size. The 40mm adjustment range enables operators to change the stop position for different box or pallet dimensions on the fly.
In high-cycle applications, use the stroke adjuster to compensate for mechanical wear in linkages or contact surfaces, maintaining precise machine timing and part placement over the cylinder's service life.
Select the SCJ100X400-40S when you require a high-force, adjustable-stroke cylinder for a 400 mm nominal stroke application. The 40 mm adjustment range is ideal for dialing in precise end positions during setup. If your force requirement is lower, stepping down to an 80 mm bore reduces push force to 2513 N at 0.5 MPa, saving space and air consumption. For a fixed stroke application without the need for field adjustment, the standard SC100X400 cylinder is a more cost-effective choice. This SCJ model is a direct replacement for another AirTAC SCJ100X400-40S with a PT port, basic mounting, and a magnet. For this 400 mm stroke, be mindful of side loads; if the application involves non-axial forces, use an external guide or switch to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
As a single-rod cylinder, push and pull forces differ. At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 7068 N.
The rear-cap adjusting screw limits the piston's stroke end position within a 40 mm range. It is not a locking or holding device. If air pressure is lost, the piston will not hold its position. An external mechanical lock or pilot-operated check valve is required for load holding.
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