The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X200-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø40mm bore, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCJ40X200-30S is a double-acting, single-rod cylinder with a field-adjustable stroke, delivering 628 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides up to 30 mm of stroke-end reduction, letting you fine-tune the stopping position on the machine without swapping the cylinder. The 16 mm piston rod and PT1/4 ports handle a wide range of general automation tasks.
This model includes a built-in magnet (-S suffix), so CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The standard TPU seal works from -20 to +70 °C, and the 200 mm nominal stroke is well within the 1200 mm maximum for this 40 mm bore, making it a robust choice for commissioning and format changeovers.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X200-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 30 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. |
| ×200 | Nominal (maximum) stroke length in mm. |
| -30 | 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 30 mm stroke-end adjustment lets technicians quickly dial in the exact stopping position during initial machine setup, eliminating the need to fabricate custom shims or external hard stops.
On packaging lines, operators can adjust the cylinder's stroke to accommodate different box or product sizes without mechanical changes, reducing downtime between production runs.
In clamping or pressing fixtures, the adjustable stroke can be periodically tweaked to take up wear on tooling or contact surfaces, maintaining consistent process quality over time.
Choose this 40 mm bore when the 32 mm SCJ's 402 N push at 0.5 MPa is too light, but the 50 mm's 982 N is oversized for your load. The 30 mm adjustable range is ideal for dialling in precise end positions during setup or accommodating part tolerance variations. For fixed-stroke applications without the need for field adjustment, the standard SC series offers a simpler, more cost-effective alternative.
A drop-in replacement must match the 40 mm bore, 200 mm nominal stroke, 30 mm adjust range, PT port thread, basic mounting, and the built-in magnet. For strokes of 300 mm or more, evaluate side-loading on the 16 mm rod; an external guide rail or a guided cylinder may be required to prevent rod bending and ensure long seal life.
Adjustable-stroke checklist
At 0.5 MPa, it provides 628 N pushing and 528 N pulling. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 1280 N. The pull force is always lower due to the single 16 mm rod reducing the piston area on the return stroke.
A rear adjusting screw limits the rod's extension, shortening the nominal 200 mm stroke by up to 30 mm. It sets a precise mechanical end-stop but does not lock the piston. It can replace an SC fixed-stroke cylinder if you need field adjustability, provided the bore, port thread, and mounting match.
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