Airtac SCJ40 Standard Cylinder SCJ40X200-40
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X200-40 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. Ø40mm bore, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke200 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X200-40
The SCJ40X200-40 is a double-acting, single-rod pneumatic cylinder with a rear adjusting screw that provides up to 40 mm of field-adjustable stroke-end reduction. At 0.5 MPa, it delivers 628 N of push force and 528 N on the pull stroke, making it suitable for positioning tasks where the final stop point needs fine-tuning during commissioning or format changes.
This 40 mm bore model uses a 16 mm diameter piston rod, PT1/4 ports, and an M12x1.25 rod thread for easy attachment of tooling. The cylinder body length (A dimension) is 185 mm, and it features an adjustable air cushion of 21 mm to decelerate the piston smoothly at the end of travel.
Airtac SCJ40 Standard Cylinder SCJ40X200-40 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X200-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 40 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 SCJ40X200-40
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×200 | 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 SCJ40 Standard Cylinder SCJ40X200-40 Is Used
End-Stop Fine-Tuning
The 40 mm adjustment screw allows operators to dial in the precise end-of-stroke position for material stops or pushers without changing the cylinder or adding external hard stops.
Format Changeovers
Quickly adapt the stroke length for different product sizes on packaging or sorting lines. The adjustable stroke eliminates the need to swap cylinders when changing between box or container formats.
Wear Compensation
In clamping or pressing fixtures, the stroke can be incrementally extended over time to compensate for wear on contact pads or tooling, maintaining consistent clamping force without reprogramming.
Is the Airtac SCJ40 Standard Cylinder SCJ40X200-40 the Right Cylinder?
For applications requiring slightly more force, stepping up to the 50 mm bore SCJ provides 982 N of push force at the same 0.5 MPa pressure. If your process demands a fixed, non-adjustable stroke, the standard SC40X200 cylinder is a direct alternative without the rear adjustment mechanism. This SCJ40X200-40 is a direct replacement for another AirTAC SCJ adjustable-stroke cylinder of the same 40 mm bore, 200 mm nominal stroke, 40 mm adjustment range, and PT port thread.
At a 200 mm stroke, side-loading on the rod should be minimized. If the load is not guided externally, consider adding an external guide rail or switching to a guided cylinder assembly to prevent rod bending and premature seal wear.
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 SCJ40 Standard Cylinder SCJ40X200-40 FAQ
A screw in the rear cap acts as an internal stop for the piston, allowing you to shorten the maximum stroke by up to 40 mm. The nominal 200 mm stroke is the maximum; turning the screw inward reduces the piston's travel distance from the rear end.
At the standard operating pressure of 0.7 MPa, the push force is 879 N and the pull force is 739 N. The maximum push force at the 1.0 MPa operating limit is 1130 N. Because it is a single-rod cylinder, the push force is always greater than the pull force.
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