Airtac SCJ40 Standard Cylinder SCJ40X110-50
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X110-50 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, 110mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke110 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X110-50
The SCJ40X110-50 is a 40 mm bore double-acting single-rod cylinder whose rear-cap adjusting screw gives a 50 mm stroke-end adjustment range, letting you dial in the exact stopping position on the machine. With a 16 mm piston rod and PT1/4 ports, it delivers 628 N of push force at 0.5 MPa, rising to 1130 N at the 0.9 MPa maximum operating pressure.
Its tie-rod body measures 185 mm (A dimension) and incorporates a 21 mm adjustable air cushion to decelerate the piston quietly. The nominal 110 mm stroke is well within the 1200 mm maximum standard stroke for this bore, so the cylinder is available as a standard stocked configuration.
Airtac SCJ40 Standard Cylinder SCJ40X110-50 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X110-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 110 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 SCJ40X110-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×110 | 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 SCJ40X110-50 Is Used
Commissioning & Setup
The 50 mm rear screw lets technicians fine-tune the end stop during initial machine bring-up without swapping cylinders or machining external hard stops.
Product Changeover
On packaging lines running multiple box sizes, operators adjust the stroke end to match each format, reducing changeover time and eliminating dedicated tooling for each product.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke takes up pad wear or material thickness variation over time, maintaining consistent contact force without reprogramming the PLC.
Is the Airtac SCJ40 Standard Cylinder SCJ40X110-50 the Right Cylinder?
Choose the SCJ40X110-50 when you need to fine-tune the stroke end during commissioning or format changes without removing the cylinder. If 628 N push at 0.5 MPa is marginal, stepping up to the SCJ50 series provides 982 N push; if space is tight, the SCJ32 offers 402 N. This adjustable-stroke unit replaces another AirTAC SCJ40 with a 110 mm nominal stroke and 50 mm adjust range, matching PT threads and basic mounting. For strokes of 300 mm or more, evaluate side-loading and consider an external guide rail to protect the rod bearing.
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 SCJ40X110-50 FAQ
At 0.5 MPa the push force is 628 N and the pull force is 528 N (the rod reduces the piston area on the return side). At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N.
Yes, provided the mounting and port threads match. The SCJ body is slightly longer to house the adjusting screw, so check the 185 mm A dimension against your available space. The adjusting screw sets the stroke end within a 50 mm range; fully extended it matches the nominal 110 mm stroke.
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