The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X180-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø40mm bore, 180mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X180-100 is a double-acting, single-rod tie-rod cylinder that integrates a rear-cap adjusting screw, giving you up to 100 mm of field-adjustable stroke-end control without removing the cylinder from the machine. With a 40 mm bore and 16 mm piston rod, it delivers 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa), making it a strong mid-range actuator for applications that need frequent fine-tuning.
Because the effective stroke can be shortened anywhere within that 100 mm window, one cylinder handles multiple product formats or compensates for tooling wear over time. The body length A(SCJ) is 185 mm, the cushion length is 21 mm, and the PT1/4 port keeps plumbing simple. This model comes with a TPU seal, PT threads, and a basic mount—ready to accept the FA, LB, or TC mounting kits from the SCJ accessory subset.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X180-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 180 mm |
| Stroke adjustment | Up to 100 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. |
| ×180 | Nominal (maximum) stroke length in mm. |
| -100 | 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.
Adjust the stroke end by up to 100 mm to handle different box heights or product sizes on the same packaging line without swapping cylinders.
Fine-tune the clamp stroke to accommodate varying workpiece thicknesses in CNC fixtures or welding jigs, ensuring consistent clamping force.
During machine commissioning, the 100 mm rear screw lets engineers quickly dial in the exact actuator stroke required, speeding up the debug and runoff phase.
Choose the SCJ40X180-100 when you need to dial in a precise end position on a 40 mm bore platform. If the 628 N push force at 0.5 MPa is too light, stepping up to the 50 mm bore (982 N push at 0.5 MPa) adds capacity; if space or force requirements are lower, the 32 mm bore (402 N push) may suffice. The 100 mm adjustment range is the largest standard option, so this model is particularly useful where the stroke must be reduced significantly from the 180 mm nominal maximum.
For a direct replacement, match the bore (40 mm), nominal stroke (180 mm), and the full -100 adjust range, along with the PT port thread and SCJ-specific mounting style. If the application does not need stroke adjustability, a fixed-stroke SC40X180 simplifies the bill of materials. At 180 mm stroke, rod deflection is minimal under axial loads, but if the load applies a significant side force, pair the cylinder with an external guide rail or switch to a guided cylinder.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N. Because it is a single-rod cylinder, push force is always greater than pull force.
Yes, provided the mounting and porting match. The SCJ40X180-100 has the same bore, nominal stroke, and port size (PT1/4) as the SC40X180, but adds a rear adjusting screw that lets you shorten the stroke by up to 100 mm. The overall body length is slightly longer to accommodate the screw mechanism.
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