The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X100-75S 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, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X100-75S is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 75 mm of field-adjustable stroke-end control. With a 40 mm bore, it delivers 628 N of push force at 0.5 MPa, making it a versatile actuator for applications that require frequent fine-tuning of the end position without swapping the cylinder.
This model features a built-in magnet (suffix -S), allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for reliable, non-contact position sensing. The 16 mm diameter piston rod, PT1/4 port, and 21 mm air cushion ensure smooth deceleration, while the TPU seal material provides a standard operating temperature range of -20 to +70 °C.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X100-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 100 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. |
| ×100 | 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.
Fine-tune the push stroke for different box or carton sizes on a packaging line. The 75 mm adjust range allows operators to quickly change the end position for a new product format without mechanical modifications.
Set a precise, repeatable stop for a glue or sealant dispensing head. The rear screw adjustment allows for easy compensation of nozzle wear or a change in bead height, ensuring consistent application quality.
Adjust the clamping stroke end to accommodate varying workpiece thicknesses in a welding or assembly fixture. The built-in magnet provides end-of-stroke confirmation to the machine controller, ensuring the part is secure.
Choose the SCJ40X100-75S when you need to dial in a precise end-stop on a 40 mm bore platform, particularly during commissioning or for multi-format tooling. The 75 mm adjustment range offers significant flexibility. If the 628 N push force at 0.5 MPa is marginal, stepping up to a 50 mm bore (SCJ50, 982 N push) provides a substantial force increase without a large jump in physical size. For a fixed, non-adjustable stroke, the standard SC40X100 is a simpler alternative.
This cylinder is a direct replacement for another AirTAC SCJ40X100-75S with a PT port, basic mount, and magnet. For strokes of 300 mm or more, evaluate the rod bearing's side-load capacity; an external guide or a guided cylinder is recommended to prevent rod bending and ensure long seal life.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this 40 mm bore cylinder produces 628 N of push force and 528 N of pull force. The maximum push force at 0.9 MPa is 1130 N. The force is identical to a fixed-stroke SC40 cylinder.
Yes, it is a direct dimensional and functional replacement for an AirTAC SCJ40X100-75S with a PT port, basic mounting, and a built-in magnet. Ensure the replacement unit matches your original cylinder's full ordering code, including the -75 adjust range and -S magnet option.
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