Airtac SCJ50 Standard Cylinder SCJ50X45-10S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X45-10S 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, 45mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke45 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X45-10S
The SCJ50X45-10S 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 10 mm of stroke-end reduction, allowing precise mechanical tuning without swapping the cylinder. The 20 mm diameter piston rod and PT1/4 ports match the standard SC family, while the built-in magnet enables easy mounting of CMSG/DMSG sensors for end-of-stroke detection.
With a 21 mm air cushion at each end and a body length A of 194 mm, this tie-rod cylinder handles operating pressures from 0.15 to 1.0 MPa. The standard TPU seals work reliably from -20 to +70 °C. This genuine AirTAC unit is a direct fit for machines needing fine, repeatable stroke adjustment during commissioning or format changes.
Airtac SCJ50 Standard Cylinder SCJ50X45-10S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X45-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 45 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 SCJ50X45-10S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×45 | 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 SCJ50X45-10S Is Used
Commissioning and Setup
Fine-tune the end-of-stroke position during initial machine setup to perfectly align with tooling or stops, saving hours of mechanical shimming and bracket adjustment.
Product Changeover
Quickly adjust the stroke length for different product sizes on a packaging or sorting line without changing the cylinder, minimizing downtime between production runs.
Wear Compensation
Compensate for mechanical wear in grippers or clamps by incrementally adjusting the stroke end, maintaining consistent clamping force and part contact over the machine's life.
Is the Airtac SCJ50 Standard Cylinder SCJ50X45-10S the Right Cylinder?
Choose the SCJ50X45-10S when you need to fine-tune the stroke end by up to 10 mm on a 50 mm bore platform. If your application requires more force, stepping up to the 63 mm bore provides 1559 N of push force at 0.5 MPa. For a fixed stroke without the adjustment screw, the standard SC50 series is a simpler, cost-effective alternative. This model is a direct replacement for another AirTAC SCJ adjustable-stroke cylinder with a 50 mm bore, 45 mm nominal stroke, 10 mm adjust range, PT ports, and a built-in magnet. The -S suffix indicates the integrated magnet for solid-state or reed sensors, eliminating the need for external switch mounting hardware.
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 SCJ50X45-10S FAQ
At the standard 0.5 MPa operating pressure, it delivers 982 N of push force and 825 N of pull force. The push force is higher due to the single-rod design. At the maximum 0.9 MPa operating pressure, the push force increases to 1767 N.
The rear-cap adjusting screw shortens the stroke end by up to 10 mm, providing a mechanical hard stop. Pick the SCJ when you need to fine-tune the piston's stopping point on the machine, such as for alignment or format changes. Choose a fixed-stroke SC cylinder if your application has a single, unchanging end position and does not require field adjustability.
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