Airtac SCJ40 Standard Cylinder SCJ40X225-50SN
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X225-50SN 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. Ø40mm bore, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke225 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X225-50SN
The SCJ40X225-50SN is a double-acting, single-rod pneumatic cylinder with a 50mm field-adjustable stroke range, offering 628 N of push force at 0.5 MPa. Its rear-cap adjusting screw allows fine-tuning of the stroke end position without removing the cylinder, ideal for commissioning and format changeovers on packaging or assembly machinery.
This model features a 16mm diameter piston rod, PT1/4 ports, and an M12x1.25 rod thread for secure tooling attachment. The NBR seals provide reliable performance with filtered air, and the built-in magnet enables direct mounting of CMSG/DMSG/EMSG sensors for precise end-of-stroke position feedback.
Airtac SCJ40 Standard Cylinder SCJ40X225-50SN Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X225-50SN |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCJ40 Standard Cylinder SCJ40X225-50SN
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 SCJ40 Standard Cylinder SCJ40X225-50SN Is Used
Commissioning & Setup
Fine-tune the end-of-stroke position during initial machine setup to perfectly align actuators with tooling, eliminating the need for shims or custom spacers.
Product Changeover
Quickly adjust the stroke end for different product sizes on a conveyor stop gate, reducing downtime between batches without swapping the cylinder.
Wear Compensation
Compensate for mechanical wear in gripper fingers or linkage pivots over time by slightly extending the stroke end, maintaining consistent clamping force.
Is the Airtac SCJ40 Standard Cylinder SCJ40X225-50SN the Right Cylinder?
Choose the SCJ40X225-50SN when you need to dial in a precise stroke end on a machine with a mid-range force requirement. If 628 N of push force is insufficient, stepping up to a 50mm bore provides 982 N. For applications where the stroke is fixed and never needs field adjustment, the standard SC series is a more economical choice. This cylinder is a direct replacement for another AirTAC SCJ cylinder with a 40mm bore, 225mm nominal stroke, and a 50mm adjustment range, using PT ports and a basic mount.
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 SCJ40 Standard Cylinder SCJ40X225-50SN FAQ
At 0.5 MPa operating pressure, the cylinder provides 628 N of push force and 528 N of pull force. The maximum push force at the 0.9 MPa operating limit is 1130 N.
A screw in the rear cap acts as an internal stop for the piston, allowing you to shorten the maximum stroke by up to 50mm. It adjusts the stroke end position only and does not affect the cylinder's force or speed.
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 SCJ40 Standard Cylinder SCJ40X225-50SN
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.