Airtac SCJ50 Standard Cylinder SCJ50X40-10
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X40-10 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. Ø50mm bore, 40mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke40 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X40-10
The SCJ50X40-10 is a 50 mm bore, double-acting single-rod pneumatic cylinder from AirTAC's adjustable-stroke SCJ series. Its defining feature is a rear-cap adjusting screw that provides up to 10 mm of fine-tuning on the stroke end position, making it ideal for commissioning and process tweaks without swapping the cylinder. It delivers a push force of 982 N at 0.5 MPa and 1767 N at 0.9 MPa.
This model has a 40 mm nominal stroke and uses a 20 mm diameter piston rod with an M16x1.5 male thread. The body length A dimension is 194 mm, and it includes an adjustable air cushion (21 mm long) for smooth deceleration. Standard PT1/4 ports and TPU seals suit general industrial air service from -20 to +70 °C.
Airtac SCJ50 Standard Cylinder SCJ50X40-10 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X40-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 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 | M16×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SCJ50 Standard Cylinder SCJ50X40-10
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | 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 SCJ50 Standard Cylinder SCJ50X40-10 Is Used
Commissioning & Setup
The 10 mm adjustment screw lets technicians quickly fine-tune the actuator's end stop on a new assembly line without needing shims or custom brackets.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke can be periodically tweaked to compensate for jaw or pad wear, maintaining consistent clamp force over time.
Part Stops & Diverters
Use the SCJ50X40-10 as a retractable part stop on a conveyor. The 10 mm adjustability allows the stop height to be matched precisely to different product batches.
Is the Airtac SCJ50 Standard Cylinder SCJ50X40-10 the Right Cylinder?
Choose the SCJ50X40-10 when you need to dial in a precise end position within a 10 mm window during setup or after wear. If you require more push force, stepping up to the 63 mm bore provides 1559 N at 0.5 MPa. For applications where the stroke length is fixed and never needs field adjustment, the standard SC50X40 fixed-stroke cylinder is a simpler, cost-effective alternative.
A direct replacement must match the 50 mm bore, 40 mm nominal stroke, 10 mm adjust range, PT ports, and basic mounting. This cylinder does not include a magnet; if sensor feedback is needed, order the SCJ50X40-10S variant with a built-in magnet for CMSG/DMSG sensors.
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 SCJ50 Standard Cylinder SCJ50X40-10 FAQ
At the standard 0.5 MPa operating pressure, it generates 982 N of push force and 825 N of pull force (the difference is due to the 20 mm rod area). At the maximum operating pressure of 1.0 MPa, the theoretical push force is 1964 N.
Yes, the SCJ50X40-10 has the same bore, nominal stroke, and mounting footprint as the SC50X40, but the body is slightly longer to house the adjustment screw. Ensure you have clearance for the rear screw mechanism and confirm the port thread (PT) matches your existing plumbing.
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