Airtac SCJ50 Standard Cylinder SCJ50X60-20S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X60-20S 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. Ø50mm bore, 60mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke60 mm
- Stroke adjust-20 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X60-20S
The SCJ50X60-20S is a double-acting, single-rod pneumatic cylinder with a 50mm bore and a 60mm nominal stroke, distinguished by its rear-cap adjusting screw that provides up to 20mm of field-adjustable stroke reduction. This model includes a built-in magnet, allowing easy integration with CMSG/DMSG/EMSG sensors for precise end-of-stroke detection. The 20mm rod and PT1/4 port deliver a push force of 982 N at 0.5 MPa, making it a robust solution for applications needing on-the-fly fine-tuning.
This genuine AirTAC SCJ unit uses a tie-rod construction with a body length of 194mm. The adjustable screw sets the stroke end position, not the force or speed, enabling quick commissioning adjustments without cylinder swaps. The standard TPU seal operates reliably from -20 to +70°C, and the integrated air cushion decelerates the piston smoothly at the end of travel.
Airtac SCJ50 Standard Cylinder SCJ50X60-20S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X60-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 60 mm |
| Stroke adjustment | Up to 20 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 SCJ50X60-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×60 | 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 SCJ50 Standard Cylinder SCJ50X60-20S Is Used
Commissioning & Setup
Ideal for machine builders who need to dial in the exact stroke during initial commissioning, eliminating the need to shim or reposition hard stops.
Wear Compensation
In clamping or pressing operations, the 20mm adjustment can take up for tooling or pad wear over time, maintaining consistent clamping force without replacing the cylinder.
Format Changeovers
Quickly adapt a stop gate or diverter for different product sizes on a packaging line by adjusting the screw, reducing downtime between production runs.
Is the Airtac SCJ50 Standard Cylinder SCJ50X60-20S the Right Cylinder?
Choose the SCJ50X60-20S when you need to fine-tune the stroke end position within a 20mm window during setup or changeovers. If your force requirements are lower, stepping down to a 40mm bore reduces push force to 628 N at 0.5 MPa; for higher force, a 63mm bore provides 1559 N. A fixed-stroke SC cylinder is a better choice if the stroke length is permanently fixed and never needs adjustment. For a direct replacement, match the 50mm bore, 60mm nominal stroke, 20mm adjust range, PT port thread, and the integrated magnet (-S).
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 SCJ50 Standard Cylinder SCJ50X60-20S FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 1964 N. The push force is greater than the pull force because it is a single-rod cylinder.
The rear adjusting screw sets the stroke end position, allowing you to shorten the 60mm nominal stroke by up to 20mm. This is a mechanical end-stop adjustment only. The cylinder does not lock or hold its position when air pressure is lost; an external rod brake or pilot-operated check valve is required for load holding.
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