The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X350-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø40mm bore, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X350-75 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 75 mm adjustable range, letting you shorten the 350 mm nominal stroke without removing the cylinder or adding external hard stops. With a 16 mm piston rod and M12x1.25 rod thread, it delivers 628 N of push force at 0.5 MPa, scaling up to 1130 N at the maximum operating pressure of 0.9 MPa.
This 40 mm bore model uses a PT1/4 port and includes an adjustable air cushion for smooth deceleration. The tie-rod construction keeps it serviceable, and the body length A(SCJ) is 185 mm, making it a compact choice for applications where stroke length needs to be dialed in during commissioning or changeover. It is a genuine AirTAC component built for reliable, repeatable linear motion.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X350-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 350 mm |
| Stroke adjustment | Up to 75 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. |
| -75 | 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 75 mm adjustable stroke allows engineers to empirically find the perfect end-stop position on a new machine or test rig without machining custom spacers or swapping out cylinders for different fixed strokes.
Ideal for packaging or sorting lines where a pusher stroke must be quickly altered to handle different product sizes. The rear screw adjustment enables a fast, tool-based changeover between production runs.
In clamping or pressing operations, the adjustable stroke end can be periodically tweaked to compensate for wear on tooling or contact surfaces, maintaining consistent clamping force and position over the equipment's life.
Choose the SCJ40X350-75 when your application demands a stroke that can be field-adjusted up to 75 mm shorter than the nominal 350 mm. If you need more force, stepping up to the 50 mm bore SCJ50 series provides 982 N of push at 0.5 MPa. For a fixed, non-adjustable stroke, the standard SC series is a simpler alternative. This cylinder is a direct replacement for another AirTAC SCJ adjustable-stroke cylinder of the same 40 mm bore, 350 mm nominal stroke, 75 mm adjust range, PT port thread, basic mounting, and without a magnet.
Given the 350 mm stroke, be mindful of side-loading on the 16 mm rod. If the load is not perfectly guided, the rod can deflect and cause premature seal wear. For applications with significant misalignment or side forces, consider pairing this cylinder with an external guide rail or selecting a guided cylinder assembly to protect the rod and bearings.
Adjustable-stroke checklist
The push force is 628 N at 0.5 MPa and 1130 N at 0.9 MPa. The pull force is lower due to the single rod's area, providing 528 N at 0.5 MPa. The rear adjusting screw changes only the stroke end position and does not alter the cylinder's force output.
A screw in the rear cap limits the piston's retraction, allowing you to shorten the stroke by up to 75 mm. It directly replaces an AirTAC SCJ40X350-75 with the same bore, nominal stroke, adjust range, and port thread. It cannot replace a fixed-stroke SC cylinder without considering the slightly longer body length and the need for access to the adjustment screw.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.