The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X210-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø40mm bore, 210mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X210-40S is a double-acting, single-rod pneumatic cylinder from AirTAC, featuring a rear-cap adjusting screw that provides a 40 mm field-adjustable stroke range. This allows you to fine-tune the stroke end position without removing the cylinder, ideal for commissioning and format changes. The built-in magnet enables direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
With a 40 mm bore and 16 mm piston rod, this model delivers 628 N of push force and 528 N of pull force at 0.5 MPa. The PT1/4 port and M12x1.25 rod thread ensure straightforward pneumatic connections. Its tie-rod construction and 21 mm air cushion provide dependable deceleration, while the 210 mm nominal stroke suits medium-reach applications requiring precise, repeatable end-position tuning.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X210-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 210 mm |
| Stroke adjustment | Up to 40 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. |
| ×210 | Nominal (maximum) stroke length in mm. |
| -40 | 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 40 mm adjustment screw allows engineers to dial in the exact stroke end position during machine commissioning without swapping out cylinders or fabricating custom hard stops, saving hours of setup time.
On packaging lines, the adjustable stroke quickly adapts the cylinder's reach for different box sizes or product formats. The built-in magnet provides sensor feedback to the PLC for each new position.
In clamping or pressing fixtures, the stroke can be incrementally extended over time to compensate for tooling or pad wear, maintaining consistent clamping force without mechanical rework.
Choose the SCJ40X210-40S when your application demands a 40 mm stroke-end adjustment range with integrated magnetic piston sensing. If you need more force, stepping up to the SCJ50 bore provides 982 N of push force at the same 0.5 MPa pressure. For applications where the stroke is fixed after initial setup, a standard SC40 fixed-stroke cylinder is a simpler, more cost-effective alternative.
For replacement, match this model with another AirTAC SCJ adjustable-stroke cylinder of 40 mm bore, 210 mm nominal stroke, 40 mm adjustment range, PT port thread, and a built-in magnet. With a stroke of 210 mm, side-loading is a moderate consideration; ensure the load is guided externally or use a guided cylinder if significant radial forces are present to prevent premature rod bearing wear.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder generates 628 N of push force and 528 N of pull force. The maximum push force at the 0.9 MPa operating limit is 1130 N. The rear adjusting screw changes only the stroke end position, not the cylinder's force output.
Not directly. A standard SC40 has a fixed stroke and lacks the rear adjusting screw. To maintain the field-adjustable stroke function, you must replace it with another SCJ40X210-40S or an SCJ40 with the same 210 mm nominal stroke and 40 mm adjustment range.
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