The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X100-50H is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø40mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X100-50H is a double-acting, single-rod pneumatic cylinder with a 50 mm field-adjustable stroke range, letting you fine-tune the end position without swapping the unit. Its 16 mm rod generates 628 N of push force at 0.5 MPa, making it a versatile actuator for medium-duty tasks.
Equipped with Viton (FKM) seals, this model operates reliably in high-temperature environments from 0 to +150 °C, well beyond the standard -20 to +70 °C range. The PT1/4 port and 21 mm air cushion ensure smooth, controlled deceleration, while the tie-rod construction keeps maintenance straightforward.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X100-50H |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 50 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. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -50 | 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 50 mm adjustment screw allows technicians to precisely set the stroke end on a new machine without mechanical stops, speeding up initial setup and troubleshooting.
Viton seals enable this cylinder to operate in ovens or near heat sources up to 150°C, where the stroke can be quickly re-adjusted for different product sizes during a hot changeover.
On a packaging line, the screw can be periodically advanced to compensate for wear on an external stop pad, maintaining precise placement without replacing the cylinder.
Choose the SCJ40X100-50H when you need to dial in a precise stroke end during commissioning or changeovers. If 628 N of push force is insufficient, stepping up to the 50 mm bore provides 982 N at the same pressure. For applications requiring a fixed, non-adjustable stroke, the standard SC series is a more economical choice. A direct replacement must match the 40 mm bore, 100 mm nominal stroke, 50 mm adjust range, PT ports, and Viton seals. For strokes of this length, ensure the load is guided to prevent side-loading on the rod.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this single-rod cylinder provides 628 N of push force and 528 N of pull force. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1280 N.
Yes, if you need field-adjustable stroke. The SCJ40X100-50H shares the same bore, port, and mounting dimensions as the SC series but adds a rear adjusting screw. Ensure your mounting and port type (PT) match for a direct fit.
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