Airtac SCJ40 Standard Cylinder SCJ40X40-10STC
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X40-10STC 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, 40mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke40 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X40-10STC
The SCJ40X40-10STC is a double-acting, single-rod pneumatic cylinder that lets you fine-tune the stroke end position by up to 10 mm using the rear adjusting screw, without removing the cylinder from the machine. With a 40 mm bore and 16 mm rod, it delivers 628 N of push force at 0.5 MPa, making it a solid choice for light clamping, sorting gates, and material stops that need quick in-field adjustment.
This model includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors and ships with a centre trunnion (TC) pivot mount and the matching TCM1 bracket, so it can swing freely in a clevis frame. The PT1/4 port, 21 mm air cushion, and TPU seals keep it running smoothly in standard -20 to +70 °C environments.
Airtac SCJ40 Standard Cylinder SCJ40X40-10STC Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X40-10STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 40 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.
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 SCJ40X40-10STC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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.
Where the Airtac SCJ40 Standard Cylinder SCJ40X40-10STC Is Used
Commissioning & Setup
Dial in the exact end-stop position during machine commissioning with the 10 mm adjustment screw, eliminating the need for shims or custom hard stops.
Product Gate Adjustment
Fine-tune a diverter gate stroke on a small conveyor line when switching between product sizes, using the sensor-ready magnet for end-of-stroke detection.
Wear Compensation
Take up mechanical wear in a clamp or press fixture over time by advancing the stroke end slightly, maintaining consistent contact pressure without replacing the cylinder.
Is the Airtac SCJ40 Standard Cylinder SCJ40X40-10STC the Right Cylinder?
Step up to a 50 mm bore SCJ (982 N push at 0.5 MPa) if the 628 N output of this 40 mm unit is marginal for your load. If your application does not require field-adjustable stroke, a fixed-stroke SC40 cylinder is a simpler, lower-cost alternative. For a direct replacement, match the 40 mm bore, 40 mm nominal stroke, -10 adjust range, PT thread, TC mount with TCM1 bracket, and the -S magnet option.
At this compact 40 mm stroke, rod side-loading is rarely a concern, but always align the rod with the load axis. If the load path is not perfectly linear, consider adding an external guide rail to protect the rod bearing from premature wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ40X40-10STC FAQ
At 0.5 MPa, it generates 628 N pushing and 528 N pulling. The push force is higher because the single rod reduces the effective piston area on the return stroke. Maximum push force at 0.9 MPa is 1130 N.
Yes, if you need the 10 mm field-adjustable stroke feature. Ensure the port size (PT1/4), mounting (centre trunnion with TCM1 bracket), and magnet sensor option match your existing setup. The SCJ body is slightly longer than a fixed-stroke SC of the same bore to accommodate the adjusting screw.
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