Airtac SCJ50 Standard Cylinder SCJ50X450-50
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X450-50 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, 450mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke450 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X450-50
The SCJ50X450-50 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 50 mm of field-adjustable stroke-end reduction. With a 50 mm bore and 20 mm piston rod, it delivers 982 N of push force and 825 N of pull force at 0.5 MPa, rising to 1767 N push at the maximum operating pressure of 0.9 MPa.
This adjustable-stroke design lets commissioning engineers fine-tune the end position without swapping the cylinder or adding external hard stops. The body length A dimension is 194 mm, and the cylinder features an adjustable air cushion for smooth deceleration. Its PT1/4 ports and M16x1.5 rod thread make it a direct fit for standard AirTAC SCJ50-series mountings.
Airtac SCJ50 Standard Cylinder SCJ50X450-50 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X450-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 450 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 SCJ50X450-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×450 | 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 SCJ50X450-50 Is Used
Commissioning & Setup
Fine-tune the stroke end by up to 50 mm during machine commissioning without removing the cylinder, speeding up the installation of multi-station automation cells.
Format Changeovers
Quickly adjust the push-off or stop position on packaging lines when switching between product sizes, eliminating the need for mechanical stop rework.
Wear Compensation
Take up mechanical wear in end-of-arm tooling or clamping fixtures over time by simply turning the rear adjusting screw, maintaining consistent part contact.
Is the Airtac SCJ50 Standard Cylinder SCJ50X450-50 the Right Cylinder?
Choose the SCJ50X450-50 when you need to dial in a precise stroke end during setup or changeover, with the 50 mm adjustment range covering most format shifts. If your force requirement is lower, the SCJ40 series offers 628 N push at 0.5 MPa; for higher force, the SCJ63 delivers 1559 N. For applications where the stroke is fixed and never needs field adjustment, the standard SC50 fixed-stroke cylinder is a simpler, lower-cost alternative.
At 450 mm of nominal stroke, this cylinder has a significant extended rod length. Manage side loads by using an external linear guide or consider a guided cylinder if the load is not perfectly axial. The SCJ50X450-50 replaces any AirTAC SCJ50 cylinder with the same 450 mm nominal stroke, 50 mm adjustment range, PT ports, and basic mounting configuration.
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 SCJ50X450-50 FAQ
At 0.5 MPa, the cylinder produces 982 N of push force and 825 N of pull force. At the maximum operating pressure of 0.9 MPa, push force increases to 1767 N. The pull force is lower because the 20 mm piston rod reduces the effective piston area on the return stroke.
Yes, provided the fixed-stroke SC50 has the same 50 mm bore and PT1/4 ports. The SCJ50X450-50 has a slightly longer body to accommodate the adjusting screw, so confirm the available space. The mounting accessories (FA, LB, TC) are shared between the SC and SCJ families.
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