The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X350-100S 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, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X350-100S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the 350 mm nominal stroke by up to 100 mm using the rear-cap adjusting screw. With a 16 mm diameter piston rod and PT1/4 ports, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it a versatile mid-bore actuator for applications that need on-machine stroke trimming.
A built-in magnet is integrated into the piston, so standard CMSG, DMSG, or EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection without extra brackets. The body length A(SCJ) is 185 mm, and the adjustable air cushion at both ends decelerates the piston smoothly, reducing impact noise and wear during high-cycle operation.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X350-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 350 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. |
| ×350 | 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.
During machine commissioning, the 100 mm adjustment range lets technicians dial in the exact stroke end position without swapping cylinders or machining external hard stops, saving hours of setup time on packaging and assembly lines.
On multi-product conveyor systems, operators can quickly adjust the cylinder stroke to match different box or pallet sizes. The rear screw is accessible without dismounting the cylinder, enabling rapid format changes between production runs.
In clamping and pressing fixtures, the adjustable stroke end compensates for tooling wear or material thickness variation over time. A simple screw turn restores the correct end position, extending the service life of consumable tooling.
Step up to the 50 mm bore SCJ if your application needs more force—the SCJ50 delivers 982 N of push at 0.5 MPa. For a simpler fixed-stroke solution where the stroke never changes, the standard SC40 series removes the adjusting mechanism and is slightly shorter overall. If your 350 mm stroke creates a risk of rod bending under side load, pair this cylinder with an external guide rail or consider a guided cylinder to protect the rod and bearing.
This SCJ40X350-100S is a direct replacement for any AirTAC SCJ adjustable-stroke cylinder of the same 40 mm bore, 350 mm nominal stroke, and 100 mm adjustment range, provided the port thread is PT, the magnet option (-S) is present, and the mounting is basic. Always match the full ordering code to ensure correct sensor compatibility and cushion performance.
Adjustable-stroke checklist
At 0.5 MPa, this cylinder generates 628 N of push force and 528 N of pull force. The adjustable stroke screw only changes the stroke end position within the 100 mm range; it does not alter the bore size, piston area, or output force. Force is determined solely by the 40 mm bore and operating pressure.
Yes, if your existing cylinder is an AirTAC SCJ40 with a 350 mm nominal stroke, 100 mm adjustment range, PT ports, a built-in magnet, and basic mounting. The SCJ series is a tie-rod design, so dimensional interchangeability is guaranteed only with another AirTAC SCJ of the same full code. Always verify the adjust range and sensor type before ordering.
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