Airtac SCJ50 Standard Cylinder SCJ50X450-50S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X450-50S 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 SCJ50X450-50S
The SCJ50X450-50S is a double-acting, single-rod cylinder with a rear adjusting screw that provides up to 50 mm of field-adjustable stroke-end control. This lets you fine-tune the stop position without swapping the cylinder, ideal for commissioning and format changes. The 50 mm bore delivers 982 N of push force at 0.5 MPa, and the 20 mm rod provides robust guidance for mid-range automation tasks.
A built-in magnet is included, allowing direct mounting of CMSG, DMSG, or EMSG sensors for reliable end-of-stroke detection. The cylinder uses a PT1/4 port, M16x1.5 rod thread, and a 21 mm air cushion for smooth deceleration. With a body length of 194 mm plus stroke, it fits neatly into machines where adjustable positioning is a daily requirement.
Airtac SCJ50 Standard Cylinder SCJ50X450-50S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X450-50S |
|---|---|
| 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 SCJ50X450-50S
| 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 SCJ50X450-50S Is Used
Commissioning & Setup
Engineers use the 50 mm adjustment screw to quickly dial in the exact stop position during machine commissioning, eliminating the need to fabricate shims or swap cylinders.
Packaging Line Changeover
On a packaging line, operators adjust the stroke end to accommodate different box sizes without tools, reducing downtime between product runs.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke compensates for tooling wear over time, maintaining consistent clamp force without replacing the actuator.
Is the Airtac SCJ50 Standard Cylinder SCJ50X450-50S the Right Cylinder?
Choose the SCJ50X450-50S when you need to dial in a precise stroke end on a 450 mm nominal cylinder. If your force needs are lower, the SCJ40 series offers 628 N push; for higher demands, the SCJ63 provides 1559 N. This model is a direct replacement for any AirTAC SCJ50X450-50S with a PT port and magnet. For fixed-stroke applications, consider the standard SC series. At this stroke length, ensure the rod is supported against side loads; an external guide or guided cylinder is recommended if the load is not perfectly axial.
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 SCJ50X450-50S FAQ
A screw in the rear cap lets you shorten the stroke end by up to 50 mm from the nominal 450 mm. This sets a new mechanical stop for the piston, allowing fine-tuning without affecting the cylinder's bore or force output.
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. The difference is due to the single-rod design, where the rod reduces the piston area on the return stroke.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SCJ Adjustable-Stroke Cylinders
Request a Quote for Airtac SCJ50 Standard Cylinder SCJ50X450-50S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.