Airtac SCJ50 Standard Cylinder SCJ50X50-50
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-50 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø50mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke50 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X50-50
The SCJ50X50-50 delivers 982 N of push force at 0.5 MPa and 1767 N at the maximum operating pressure of 0.9 MPa, making it a compact workhorse for medium-duty pneumatic tasks. Its 20 mm diameter piston rod and PT1/4 ports balance flow and strength, while the rear adjusting screw provides a full 50 mm of stroke-end reduction—ideal for dialling in precise stopping positions without swapping the cylinder.
This double-acting, single-rod cylinder uses a tie-rod construction with a 21 mm air cushion to decelerate the piston quietly. The body length A(SCJ) is 194 mm, and the adjustable stroke mechanism lets you fine-tune the end position during commissioning or after tooling wear, all while maintaining the full 50 mm nominal stroke rating.
Airtac SCJ50 Standard Cylinder SCJ50X50-50 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 50 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 SCJ50X50-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -50 | 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 SCJ50X50-50 Is Used
Commissioning Fine-Tuning
Adjust the stroke end by up to 50 mm on the machine during initial setup, eliminating the need to stock multiple fixed-stroke cylinders for trial runs.
Format Changeover
Quickly adapt the cylinder's stopping position for different product sizes on a packaging line without mechanical rework, reducing downtime between batches.
Wear Compensation
Take up mechanical play in grippers or stops over time by turning the rear screw, restoring precise positioning without replacing the actuator.
Is the Airtac SCJ50 Standard Cylinder SCJ50X50-50 the Right Cylinder?
Step up to a 63 mm bore if you need more force—the SCJ63 delivers 1559 N push at 0.5 MPa. For applications where the stroke must never change after setting, the fixed-stroke SC50 is a simpler, lower-cost alternative. This SCJ50X50-50 replaces any AirTAC SCJ50 with a 50 mm nominal stroke and a 50 mm adjustment range, matching PT ports and basic mounting. If you add an external guide or switch to a guided cylinder, you can manage side loads that might otherwise bend the 20 mm rod.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ50X50-50 FAQ
A rear-cap screw lets you shorten the stroke end by up to 50 mm from the 50 mm nominal maximum. It sets the piston's stopping point without affecting the bore size, push/pull force, or speed—it is purely a mechanical stroke-end limiter.
At 0.5 MPa, the push force is 982 N and the pull force is 825 N (due to the 20 mm rod area). At the maximum operating pressure of 0.9 MPa, push reaches 1767 N. These values match the standard SC50 single-rod cylinder.
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