Airtac SCJ50 Standard Cylinder SCJ50X20-10FA
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X20-10FA 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, 20mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke20 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X20-10FA
The SCJ50X20-10FA is a double-acting, single-rod pneumatic cylinder that puts fine stroke-end adjustment directly on the machine. With its 10 mm rear adjusting screw, you can dial in the exact end position without swapping the cylinder or adding external hard stops—ideal for commissioning tweaks and format changeovers. This model features a 50 mm bore, 20 mm nominal stroke, and a front rectangular flange (FA) for secure panel mounting.
At 0.5 MPa it delivers 982 N of push force and 825 N on the pull stroke, thanks to the 20 mm piston rod. The cylinder body measures 194 mm in length (A dimension) and includes a 21 mm air cushion for smooth deceleration. It uses PT1/4 ports and an M16x1.5 rod thread, with TPU seals for standard -20 to +70 °C operation.
Airtac SCJ50 Standard Cylinder SCJ50X20-10FA Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X20-10FA |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 20 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 SCJ50X20-10FA
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×20 | 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 SCJ50X20-10FA Is Used
Commissioning & Setup
Fine-tune the stroke end position by up to 10 mm during machine bring-up without removing the cylinder. The rear screw lets technicians dial in the exact stop point for grippers, clamps, or ejectors.
Wear Compensation
In high-cycle assembly fixtures, tooling pads or contact surfaces wear over time. The adjustable stroke lets operators compensate for this wear in seconds, maintaining consistent part contact without shims.
Format Changeover
On packaging or labelling lines, different product sizes need different cylinder strokes. The SCJ50X20-10FA allows quick stroke adjustment for small-batch changeovers, reducing downtime between formats.
Is the Airtac SCJ50 Standard Cylinder SCJ50X20-10FA the Right Cylinder?
Choose the SCJ50 bore when you need roughly 980 N of push force at standard plant air pressure; if your load is lighter, the SCJ40 delivers 628 N push and may reduce air consumption. For heavier work, the SCJ63 steps up to 1559 N push. The 10 mm adjustable range on this model is suited to fine end-stop tuning; if you need a wider adjustment window, select a model with a -20 or -30 suffix. This FA front-flange configuration (mounting code F-SC50FA) bolts directly to a machine panel or end plate.
For replacement, match the 50 mm bore, 20 mm nominal stroke, -10 adjust range, PT port thread, and FA mounting style. If the application needs position sensing, specify the -S magnet option so CMSG/DMSG sensors can be clamped to the barrel. For strokes above 300 mm in this bore, evaluate side-loading and consider an external guide rail or a guided cylinder to protect the rod bearing.
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 SCJ50X20-10FA FAQ
At 0.5 MPa it pushes with 982 N and pulls with 825 N. At the maximum operating pressure of 0.9 MPa, push force reaches 1767 N. The difference between push and pull is due to the 20 mm single rod reducing the piston area on the return stroke.
Yes, this is a genuine AirTAC SCJ50X20-10FA. It will directly replace any SCJ50 cylinder with a 20 mm nominal stroke, -10 mm adjustable range, PT ports, and FA front flange mount. If your old cylinder had a magnet for sensors, ensure you order the -S variant.
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