The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X500-40 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. Ø40mm bore, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X500-40 is a double-acting, single-rod pneumatic cylinder with a 40 mm rear adjusting screw, allowing the effective stroke to be fine-tuned from its 500 mm nominal maximum. This field-adjustable stroke end is ideal for commissioning, format changeovers, and wear take-up without removing the cylinder. The 40 mm bore delivers a push force of 628 N at 0.5 MPa and 1130 N at 0.9 MPa, using a 16 mm diameter piston rod.
Built on a durable tie-rod construction with a PT1/4 port, this cylinder includes an adjustable air cushion for smooth deceleration. The body length A(SCJ) is 185 mm, and the standard operating pressure ranges from 0.15 to 1.0 MPa. This basic model features a TPU seal, PT threads, and no magnet, offering a robust, cost-effective solution for general industrial automation tasks requiring a long, adjustable stroke.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X500-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 500 mm |
| Stroke adjustment | Up to 40 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. |
| ×500 | 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 retract end position of a long-stroke actuator during machine setup and commissioning, eliminating the need for custom-length hard stops.
Quickly adjust the stroke of a pusher or diverter on a conveyor line to handle different box or pallet sizes without mechanical modifications.
Periodically adjust the stroke end to compensate for mechanical wear in grippers or linkages, maintaining precise positioning over the machine's lifecycle.
Select the SCJ40X500-40 when your application needs a 500 mm stroke that can be shortened by up to 40 mm on the machine. If you require more force, stepping up to the 50 mm bore provides 982 N of push force at 0.5 MPa. For applications where the stroke length is fixed and will never need field adjustment, the standard SC fixed-stroke cylinder is a simpler alternative. This model is a direct dimensional replacement for another AirTAC SCJ40 cylinder with a 500 mm nominal stroke, 40 mm adjust range, and PT ports.
Given the 500 mm stroke length, be mindful of potential side-loading and rod buckling. For applications with significant lateral forces, use an external guide rail or consider a guided cylinder to protect the rod and seals from premature wear.
Adjustable-stroke checklist
The theoretical push force is 628 N at 0.5 MPa and 1130 N at 0.9 MPa. The pull force is lower due to the 16 mm rod area, providing 528 N at 0.5 MPa. These values are identical to the fixed-stroke SC40 cylinder.
No. The SCJ40X500-40 is not designed for load holding. The rear adjusting screw only sets the stroke end position, and the air cushion only decelerates the piston. If pressure is lost, the piston will drift. A mechanical lock or pilot-operated check valve is required for static load holding.
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.