Airtac SCJ50 Standard Cylinder SCJ50X100-20
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X100-20 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, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke100 mm
- Stroke adjust-20 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X100-20
The SCJ50X100-20 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering 982 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides up to 20 mm of stroke-end reduction, allowing you to dial in the exact stopping position without changing the cylinder or adding external hard stops. The 20 mm rod and M16x1.5 rod thread handle robust linear tasks.
This 50 mm bore tie-rod cylinder uses PT1/4 ports and features an adjustable air cushion over its 21 mm cushion length for smooth deceleration. The body length A(SCJ) is 194 mm, making it a compact solution for space-constrained automation. Operating on filtered air from 0.15 to 1.0 MPa, it is a versatile workhorse for applications where the stroke length must be tuned during commissioning or for different product runs.
Airtac SCJ50 Standard Cylinder SCJ50X100-20 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X100-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 100 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 SCJ50X100-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×100 | 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 SCJ50X100-20 Is Used
Commissioning & Setup
Ideal for machine builders who need to fine-tune the end-of-stroke position during initial setup. The 20 mm adjustment range allows precise calibration of the cylinder's stopping point without mechanical modifications.
Product Changeover
Perfect for packaging or assembly lines running multiple product sizes. The stroke can be quickly adjusted to accommodate different box heights or component positions, minimizing changeover time.
Wear Compensation
In high-cycle applications, the adjustable screw can be used to take up mechanical play or compensate for wear in tooling, maintaining consistent positioning over the cylinder's service life.
Is the Airtac SCJ50 Standard Cylinder SCJ50X100-20 the Right Cylinder?
Choose the SCJ50X100-20 when you need a 50 mm bore cylinder with a nominal 100 mm stroke that can be fine-tuned on the machine. If more force is required, stepping up to the 63 mm bore provides 1559 N of push force at the same pressure. For a fixed, non-adjustable stroke, the standard SC series is a simpler alternative. This model is a direct replacement for another AirTAC SCJ50X100-20 with PT ports and basic mounting. For strokes of 100 mm, side-loading is generally not a primary concern, but always ensure the load is guided if off-axis forces are present.
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 SCJ50X100-20 FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. The maximum push force at the 0.9 MPa operating limit is 1767 N. Because it is a single-rod cylinder, the push force is greater than the pull force due to the area of the 20 mm rod.
A rear adjusting screw lets you shorten the stroke end by up to 20 mm. Choose the SCJ over a fixed-stroke SC when you need to fine-tune the stopping position on the machine, such as during commissioning, for format changes, or to compensate for wear, without swapping the cylinder.
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