Airtac SCJ50 Standard Cylinder SCJ50X500-50S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X500-50S 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, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke500 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X500-50S
The SCJ50X500-50S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, giving you a 50 mm fine-tuning range at the rear cap. In this 50 mm bore, the 20 mm diameter rod generates 982 N of push force at 0.5 MPa, while the adjustable screw lets you dial in the exact stroke end position without swapping the cylinder or adding external hard stops.
This model includes a built-in magnet (-S suffix), so you can mount CMSG, DMSG, or EMSG reed and solid-state sensors directly on the tie-rod barrel for reliable end-of-stroke detection. The body length A(SCJ) is 194 mm plus the 500 mm stroke, and the PT1/4 ports and M16x1.5 rod thread keep it compatible with standard AirTAC SCJ accessories.
Airtac SCJ50 Standard Cylinder SCJ50X500-50S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X500-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 500 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 SCJ50X500-50S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×500 | 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 SCJ50X500-50S Is Used
Commissioning & Setup
During initial machine commissioning, the 50 mm adjustment screw lets technicians fine-tune the stroke end position to perfectly align with tooling or fixtures without iterative cylinder swaps.
Wear Take-Up on Stops
In material handling systems where a physical stop wears over time, the adjustable stroke can be periodically tweaked to compensate, maintaining precise placement without replacing the stop or cylinder.
Format Changeover
On packaging lines that handle multiple product sizes, operators can quickly adjust the stroke end for a new format, reducing changeover time compared to fixed-stroke cylinders.
Is the Airtac SCJ50 Standard Cylinder SCJ50X500-50S the Right Cylinder?
Step up to the 63 mm bore if you need more force—the SCJ63 delivers 1559 N push at 0.5 MPa. For applications that don't require stroke adjustment, a fixed-stroke SC50X500 is a simpler, lower-cost alternative. To replace this unit, match the 50 mm bore, 500 mm nominal stroke, 50 mm adjustment range, PT port thread, and the built-in magnet; basic mounting means no additional bracket is needed.
At a 500 mm stroke, the extended rod is susceptible to side loading and bending. If your application imposes any lateral force, add an external linear guide or switch to a guided cylinder to protect the rod bearing and piston seals from premature wear.
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 SCJ50X500-50S FAQ
At the standard 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force (the difference is due to the 20 mm rod area). At the maximum 0.9 MPa operating pressure, the push force reaches 1767 N.
A rear-cap adjusting screw lets you shorten the stroke end by up to 50 mm from the 500 mm nominal maximum. Choose the SCJ when your application requires fine-tuning the end position during setup, for format changes, or to compensate for wear—without replacing the cylinder. If your stroke length is fixed and never needs adjustment, the standard SC series is the more economical choice.
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