Airtac SCJ40 Standard Cylinder SCJ40X130-20
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X130-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø40mm bore, 130mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke130 mm
- Stroke adjust-20 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X130-20
The SCJ40X130-20 is a 40 mm bore, single-rod double-acting cylinder with a rear adjusting screw that provides up to 20 mm of field-adjustable stroke-end reduction. At 0.5 MPa it delivers 628 N push and 528 N pull, making it a solid mid-range actuator for tasks where the final stop position must be dialled in during commissioning or changeover.
This tie-rod cylinder uses a 16 mm rod, PT1/4 ports, and an M12x1.25 rod thread. Its adjustable cushion decelerates the piston over the last 21 mm of travel, and the body length A(SCJ) is 185 mm. The standard stroke range for this bore extends to 1200 mm, so the 130 mm nominal stroke is well within standard limits.
Airtac SCJ40 Standard Cylinder SCJ40X130-20 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X130-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 130 mm |
| Stroke adjustment | Up to 20 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.
Theoretical Output Force (Ø40mm)
| 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.
Model Code: Airtac SCJ40 Standard Cylinder SCJ40X130-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×130 | Nominal (maximum) stroke length in mm. |
| -20 | 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.
Where the Airtac SCJ40 Standard Cylinder SCJ40X130-20 Is Used
Commissioning & Setup
The 20 mm adjust range lets technicians dial in the exact stroke end position on a new machine without cutting brackets or re-machining stops, speeding up factory acceptance testing.
Format Changeover
On packaging or labelling lines, operators can quickly adjust the cylinder stroke to suit different product sizes, reducing downtime between batch runs.
Wear Compensation
In clamping or pressing fixtures, the screw can be advanced over time to take up mechanical wear on tooling or seals, maintaining consistent contact force without replacing the cylinder.
Is the Airtac SCJ40 Standard Cylinder SCJ40X130-20 the Right Cylinder?
Choose the SCJ40X130-20 when you need to fine-tune the stroke end by up to 20 mm without swapping cylinders or adding external hard stops. If the 628 N push force at 0.5 MPa is marginal, stepping up to a 50 mm bore (SCJ50, 982 N push) provides a significant force increase without a large footprint jump. For applications requiring a fixed, repeatable stroke with no field adjustment, the standard SC40 series is a simpler, cost-effective alternative.
For direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with 40 mm bore, 130 mm nominal stroke, a 20 mm adjust range, PT ports, and the same basic mounting configuration. If position sensing is needed, the -S magnet option allows CMSG/DMSG sensors to be clamped directly to the barrel.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-20)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ40 Standard Cylinder SCJ40X130-20 FAQ
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1280 N. The push force is higher than pull because the single rod reduces the piston area on the return side.
A screw in the rear cap sets the stroke end position. Turning the screw shortens the effective stroke by up to 20 mm from the 130 mm nominal maximum. It adjusts only the end stop, not the cylinder's speed or force, and does not lock the piston in place when air pressure is removed.
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