Airtac SCJ50 Standard Cylinder SCJ50X450-10
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X450-10 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 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-10 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X450-10
The SCJ50X450-10 is a double-acting, single-rod pneumatic cylinder from the AirTAC SCJ adjustable-stroke series, combining a 50 mm bore with a nominal 450 mm stroke. A rear-cap adjusting screw provides a 10 mm fine-tuning range for the stroke end position, allowing machine builders to dial in the exact stopping point during commissioning or after wear without replacing the cylinder. At 0.5 MPa, it delivers 982 N of push force and 825 N of pull force, making it a capable mid-bore actuator for medium-length linear moves.
This model uses a 20 mm diameter piston rod with an M16x1.5 rod thread and PT1/4 ports. The body length A(SCJ) is 194 mm plus stroke, and the integrated air cushion (21 mm) decelerates the piston smoothly. The default configuration features a TPU seal for standard -20 to +70 °C operation, a basic mount, and PT threads. For position sensing, the optional -S magnet variant is available.
Airtac SCJ50 Standard Cylinder SCJ50X450-10 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X450-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 450 mm |
| Stroke adjustment | Up to 10 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 SCJ50X450-10
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×450 | Nominal (maximum) stroke length in mm. |
| -10 | 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 SCJ50X450-10 Is Used
Commissioning Fine-Tuning
The 10 mm adjustment screw lets technicians precisely set the end-of-stroke position during machine setup, compensating for small tolerance stack-ups in the assembly without shimming or re-machining brackets.
Wear Take-Up in Clamping
In a repetitive clamping operation, the adjustable stroke can be periodically shortened by up to 10 mm to compensate for wear on the clamp pads or the workpiece, maintaining consistent clamping force over time.
Format Changeover Stop
For a machine that processes two slightly different product heights, the operator can quickly adjust the screw to change the cylinder's end stop by a few millimeters, eliminating the need for a mechanical hard stop change.
Is the Airtac SCJ50 Standard Cylinder SCJ50X450-10 the Right Cylinder?
Choose the SCJ50X450-10 when you need a 450 mm stroke with a 10 mm field-adjustable end position, such as for fine-tuning a stop point in a packaging or assembly fixture. If the force is insufficient, stepping up to an SCJ63 bore provides 1559 N of push force at 0.5 MPa. For applications requiring a fixed, non-adjustable stroke, the standard SC50X450 is a simpler alternative. A direct replacement must match the 50 mm bore, 450 mm nominal stroke, 10 mm adjust range, PT ports, and basic mounting.
At a 450 mm stroke, the extended rod is susceptible to side loading and bending. If the load is not perfectly guided, install an external linear guide or consider a guided cylinder to prevent premature rod bearing and seal wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ50X450-10 FAQ
At the standard 0.5 MPa operating pressure, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1964 N. The pull force is lower due to the area of the 20 mm piston rod.
The SCJ50X450-10 can replace an SC50X450 if you have the extra space for the rear adjusting screw mechanism and need the 10 mm stroke-end adjustment. The port size (PT1/4), rod thread (M16x1.5), and mounting footprints are otherwise compatible. If you do not need adjustability, the standard SC50X450 is the direct fixed-stroke replacement.
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