The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X350-10 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø40mm bore, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X350-10 is a 40 mm bore double-acting single-rod cylinder featuring a rear-cap adjusting screw that provides up to 10 mm of field-adjustable stroke reduction. This allows machine builders to fine-tune the end position without swapping the cylinder or adding external hard stops, making it ideal for commissioning and format changeovers. It delivers a push force of 628 N at 0.5 MPa and uses a 16 mm diameter piston rod with M12x1.25 threads.
With a nominal stroke of 350 mm, this model operates within the standard stroke range for the 40 mm bore. The body length A is 185 mm, and the cylinder includes an adjustable pneumatic cushion to decelerate the piston smoothly at the end of travel. This basic configuration features a TPU seal for standard temperatures (-20 to +70 °C) and PT ports, ready for straightforward integration.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X350-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 350 mm |
| Stroke adjustment | Up to 10 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. |
| ×350 | Nominal (maximum) stroke length in mm. |
| -10 | 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 10 mm adjustment screw lets technicians dial in the exact stroke during initial machine setup, compensating for minor assembly variations in fixtures or tooling without mechanical rework.
On packaging or sorting lines, the adjustable stroke allows operators to quickly reset the cylinder's end position for different product sizes, minimizing downtime between batches.
In clamping or pressing operations, the stroke can be incrementally extended over time to account for pad or tooling wear, maintaining consistent clamping force without replacing parts.
Choose the SCJ40X350-10 when you need a mid-range stroke with a small adjustment window for precise end-stop tuning. If your force requirements increase, stepping up to a 50 mm bore SCJ provides 982 N of push force at the same pressure, while a 32 mm bore offers a more compact option at 402 N. For applications where the stroke never needs field adjustment, the fixed-stroke SC series is a simpler, more cost-effective alternative.
At a 350 mm stroke, ensure the rod is adequately supported if significant side loads are present; an external guide rail or a guided cylinder should be considered to prevent rod bending. This SCJ is a direct replacement for any AirTAC SCJ40X350-10 with PT ports, basic mounting, and no magnet, matching the same bore, nominal stroke, and 10 mm adjust range.
Adjustable-stroke checklist
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. The maximum operating pressure is 1.0 MPa, yielding a theoretical push force of 1130 N at 0.9 MPa.
Yes, this is a genuine AirTAC SCJ40X350-10. It is a direct dimensional and performance match for any cylinder with the same model code, provided the original also uses a basic mount, TPU seals, and PT ports. Verify your adjust range is 10 mm.
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