The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X20-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø40mm bore, 20mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X20-10S is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw, giving you a 10 mm field-adjustable stroke-end range on a nominal 20 mm stroke. Its 16 mm rod generates 628 N of push force at 0.5 MPa, making it a compact workhorse for fine-tuning end positions in tight spaces.
This model includes a built-in magnet, allowing CMSG/DMSG/EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The body length A is 185 mm, and the PT1/4 port supplies ample flow for speeds up to 800 mm/s.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X20-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 20 mm |
| Stroke adjustment | Up to 10 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. |
| ×20 | Nominal (maximum) stroke length in mm. |
| -10 | 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 actuator end point by up to 10 mm during sensor teach-in routines, ensuring consistent trigger distances without repositioning the entire cylinder.
Adjust the stroke end to accommodate slight variations in component thickness on an assembly fixture, applying 628 N of push force for a secure hold.
Dial in the exact retract position of a glue or paste dispensing head, compensating for nozzle wear or fluid viscosity changes over a production run.
Choose this 40 mm bore SCJ when you need to dial in a short stroke with precision, avoiding the hassle of external hard stops. If your force requirement grows, stepping up to the 50 mm bore delivers 982 N of push at the same 0.5 MPa. For applications where the stroke never needs adjustment, the fixed-stroke SC series is a simpler, cost-effective alternative. A direct replacement must match the 40 mm bore, 20 mm nominal stroke, 10 mm adjust range, PT ports, and the -S magnet option.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. The maximum push force at the 0.9 MPa operating limit is 1130 N. The rear adjusting screw changes only the stroke end position, not the cylinder's force output.
Yes, if you need the adjustable stroke feature. The SCJ40X20-10S shares the same bore, rod size, and port thread as the SC40, but the body is slightly longer to house the adjusting screw. Ensure your mounting space can accommodate the 185 mm body length.
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.