Airtac SCJ50 Standard Cylinder SCJ50X450-30S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X450-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 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-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X450-30S
The SCJ50X450-30S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, giving you up to 30 mm of fine-tuning range from the nominal 450 mm maximum. Its 50 mm bore generates 982 N of push force at 0.5 MPa, making it a solid mid-range actuator for tasks that need both reach and precision.
A built-in magnet (the -S suffix) lets you clamp CMSG, DMSG, or EMSG sensors directly onto the tie-rod barrel for reliable end-of-stroke or mid-stroke position feedback. The rear adjusting screw sets the stroke end without dismounting the cylinder, so commissioning and format changes happen on the machine, not on the bench.
Airtac SCJ50 Standard Cylinder SCJ50X450-30S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X450-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 450 mm |
| Stroke adjustment | Up to 30 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 SCJ50X450-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×450 | Nominal (maximum) stroke length in mm. |
| -30 | 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 SCJ50X450-30S Is Used
Commissioning & Setup
Fine-tune the end position during machine commissioning without swapping cylinders. The 30 mm adjust range lets technicians dial in the exact stop point for grippers or clamps on a new production line.
Format Changeover
Adjust the stroke end to accommodate different product sizes on a packaging or sorting conveyor. Operators can reset the stop position quickly with the rear screw when switching between box heights or pallet types.
Wear Compensation
Take up mechanical play or seal wear over time in long-stroke pusher or ejector stations. The 30 mm adjustment range lets maintenance teams restore precise positioning without replacing the cylinder or adding shims.
Is the Airtac SCJ50 Standard Cylinder SCJ50X450-30S the Right Cylinder?
Choose the SCJ50X450-30S when you need a 50 mm bore's force class (982 N push at 0.5 MPa) plus the ability to dial in the stroke end during setup or after wear. If your load demands more force, step up to the 63 mm bore which delivers 1559 N push; for a lighter, more compact solution, the 40 mm bore offers 628 N. The 450 mm stroke is within the 1200 mm standard limit for this bore, but at this length you must manage side loads—add an external guide rail or switch to a guided cylinder if the rod sees off-axis force.
This model replaces any AirTAC SCJ50X450-30S of the same bore, nominal stroke, 30 mm adjust range, PT port thread, and built-in magnet. If stroke adjustment is not needed, a fixed-stroke SC50X450-S will be simpler and slightly shorter in body length.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ50X450-30S FAQ
At 0.5 MPa, the cylinder delivers 982 N pushing and 825 N pulling. The push force is higher because the single rod reduces the piston area on the return side. At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 1767 N.
The rear-cap adjusting screw sets the stroke end position within a 30 mm range, shortening the nominal 450 mm stroke. It is not a speed or force control. For speed regulation, use external flow controls; the cylinder's built-in air cushion decelerates the piston near the end of travel.
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