Airtac SCJ50 Standard Cylinder SCJ50X50-40
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø50mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke50 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X50-40
The SCJ50X50-40 is a 50 mm bore double-acting, single-rod cylinder with a field-adjustable stroke end. A rear-cap screw provides up to 40 mm of adjustment, letting you dial in the exact stroke position during commissioning or changeover without removing the cylinder. This model delivers 982 N of push force and 825 N of pull force at 0.5 MPa, using a 20 mm diameter piston rod and PT1/4 ports.
Its tie-rod construction and 194 mm body length (A dimension) make it a robust, serviceable workhorse for industrial automation. The adjustable cushion decelerates the piston smoothly near the stroke end, and the stroke-end screw sets the retract limit precisely within the 40 mm range. This cylinder is a genuine AirTAC component built for reliable, repeatable linear motion.
Airtac SCJ50 Standard Cylinder SCJ50X50-40 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 40 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 SCJ50X50-40
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -40 | 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 SCJ50X50-40 Is Used
Commissioning & Setup
Fine-tune the retract end position of a clamp or stop on a new assembly line. The 40 mm screw adjustment allows engineers to dial in the perfect stroke without swapping shims or cylinders.
Format Changeover
Adjust the stroke of a pusher or diverter to handle different box sizes on a packaging conveyor. Operators can quickly change the stop position with the rear screw, minimizing downtime between product runs.
Wear Compensation
Take up mechanical play in a pivot joint or linkage over time. The adjustable stroke lets maintenance teams restore the original end position as components wear, extending the machine's service life.
Is the Airtac SCJ50 Standard Cylinder SCJ50X50-40 the Right Cylinder?
Choose the SCJ50X50-40 when your application needs a 50 mm stroke that can be shortened by up to 40 mm on the machine. If you require more force, stepping up to the 63 mm bore provides 1559 N of push force at the same 0.5 MPa. For a fixed, non-adjustable stroke, the standard SC50X50 is a simpler, more cost-effective alternative. An exact replacement must match the 50 mm bore, 50 mm nominal stroke, 40 mm adjustment range, PT port thread, and basic mounting.
For strokes of 300 mm or longer, consider adding an external guide or switching to a guided cylinder to protect the 20 mm rod from side-load deflection and bending.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ 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 SCJ50X50-40 FAQ
At 0.5 MPa, the cylinder delivers 982 N of push force and 825 N of pull force. The push force is higher because the single piston rod reduces the effective area on the pull side. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 200 kgf.
Yes, if you need the adjustable stroke feature. The SCJ50X50-40 shares the same 50 mm bore, 50 mm nominal stroke, and mounting interfaces as the SC series, but adds a rear adjusting screw. Ensure the 40 mm adjustment range suits your application and verify the port thread (PT) and mounting type match your existing setup.
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 SCJ50X50-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.