Airtac SCJ50 Standard Cylinder SCJ50X300-100
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X300-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø50mm bore, 300mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke300 mm
- Stroke adjust-100 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X300-100
The SCJ50X300-100 is a double-acting, single-rod pneumatic cylinder with a rear adjusting screw that provides up to 100 mm of field-adjustable stroke-end control, allowing the effective stroke to be set anywhere between 200 and 300 mm without changing the cylinder body. It delivers a push force of 982 N at 0.5 MPa and 1767 N at the maximum operating pressure of 0.9 MPa, making it a robust choice for mid-range clamping, pressing, and positioning tasks.
With a 20 mm piston rod, PT1/4 ports, and a 21 mm air cushion, this model shares the same force profile as the fixed-stroke SC50 series. The body length A(SCJ) is 194 mm, and it can be ordered with standard strokes up to 1200 mm. The adjustable stroke is ideal for commissioning trials, format changeovers, and applications where the end-stop needs fine-tuning after installation.
Airtac SCJ50 Standard Cylinder SCJ50X300-100 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X300-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 100 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 SCJ50X300-100
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×300 | Nominal (maximum) stroke length in mm. |
| -100 | 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 SCJ50X300-100 Is Used
Commissioning & Setup
The 100 mm adjustable stroke range lets technicians dial in the exact end-stop position during machine commissioning, eliminating the need to swap out cylinders for minor stroke adjustments.
Product Format Changeover
Quickly adapt the stroke end to accommodate different product sizes on a packaging or assembly line, reducing downtime between batches without mechanical modifications.
Wear Compensation
As tooling or contact surfaces wear over time, the rear adjusting screw can be used to take up the slack and maintain precise positioning, extending the service life of the entire mechanism.
Is the Airtac SCJ50 Standard Cylinder SCJ50X300-100 the Right Cylinder?
Choose the SCJ50X300-100 when your application requires a nominal 300 mm stroke but you need the flexibility to shorten the end position by up to 100 mm in the field. If you need a fixed, unchangeable stroke, the standard SC50X300 is a simpler, more cost-effective alternative. For applications requiring a step up in force, the SCJ63 series offers 1559 N of push at 0.5 MPa.
At a 300 mm stroke, be mindful of side-loading on the 20 mm rod. If the load is not guided externally, rod deflection can accelerate seal wear. In such cases, consider adding an external guide rail or switching to a guided cylinder. For a direct replacement, match the 50 mm bore, 300 mm nominal stroke, 100 mm adjust range, PT thread, and basic mounting configuration.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-100)
- ✓ 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 SCJ50X300-100 FAQ
A rear-cap adjusting screw sets the stroke end position. You can shorten the nominal 300 mm stroke by up to 100 mm in the field, giving you an effective stroke range of 200-300 mm. It does not change the cylinder's force output or speed.
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 1767 N. The pull force is lower because of the single rod's cross-sectional area.
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