The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X275-100S 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, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X275-100S is a double-acting, single-rod pneumatic cylinder that puts stroke-end tuning directly into your hands via a rear-cap adjusting screw. With a 40 mm bore and a 275 mm nominal stroke, it delivers 628 N of push force at 0.5 MPa, while the 100 mm adjustment range lets you dial back the stroke end without swapping the cylinder or adding external hard stops.
This model includes a built-in magnet (-S suffix), so you can clamp CMSG, DMSG, or EMSG reed or solid-state sensors directly onto the tie-rod barrel for reliable end-of-stroke or mid-stroke position feedback. The 16 mm diameter piston rod, PT1/4 ports, and 21 mm air cushion work together to handle dynamic loads smoothly, with a body length A(SCJ) of 185 mm plus stroke.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X275-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 275 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. |
| ×275 | 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.
The 100 mm screw adjustment lets commissioning engineers quickly dial in the optimal retract position on a new assembly line without cutting guide rails or fabricating custom stops.
When a packaging machine switches between box sizes, the operator can adjust the stroke end in seconds to match the new case dimension, minimizing downtime between production runs.
In a woodworking clamp or press fixture, the adjustable stroke compensates for pad wear over time. The built-in magnet allows a sensor to confirm the clamp has reached its adjusted position.
Choose the SCJ40X275-100S when you need to fine-tune the retract stroke end during commissioning or format changes on a 40 mm bore platform. If your force requirement drops, the SCJ32 series provides 402 N push at 0.5 MPa; for heavier loads, step up to the SCJ50 which offers 982 N. This adjustable-stroke model is ideal when the machine needs periodic end-stop correction, but if your application demands a fixed, repeatable stroke every cycle without field adjustment, the standard SC fixed-stroke cylinder is a simpler, more cost-effective alternative. For a direct replacement, match the 40 mm bore, 275 mm nominal stroke, 100 mm adjustment range, PT port thread, basic mount, and the -S magnet option.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, it produces 628 N of push force and 528 N of pull force (the pull is lower due to the single 16 mm rod area). At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1280 N.
Yes, provided the bore (40 mm), nominal stroke (275 mm), and port size (PT1/4) match. The SCJ body is slightly longer to house the adjusting screw, so verify the extended body length A(SCJ) of 185 mm plus stroke fits your machine envelope. You must also match the magnet option (-S) if you use sensors.
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