Airtac SCJ40 Standard Cylinder SCJ40X275-10
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X275-10 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø40mm bore, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke275 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X275-10
The AirTAC SCJ40X275-10 is a double-acting, single-rod pneumatic cylinder that delivers 628 N of push force at 0.5 MPa, making it a solid mid-range actuator for general automation. Its defining feature is a rear-cap adjusting screw that provides up to 10 mm of field-adjustable stroke reduction, allowing you to precisely dial in the stroke end position without changing the cylinder or adding external hard stops.
With a 16 mm diameter piston rod and PT1/4 ports, this model has a body length of 185 mm plus stroke and an air cushion length of 21 mm for smooth deceleration. It operates on 40 µm filtered air at 0.15-1.0 MPa and is rated for speeds from 30 to 800 mm/s, suiting it for applications where you need to fine-tune the actuator's reach during commissioning or changeovers.
Airtac SCJ40 Standard Cylinder SCJ40X275-10 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X275-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 275 mm |
| Stroke adjustment | Up to 10 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 SCJ40X275-10
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×275 | Nominal (maximum) stroke length in mm. |
| -10 | 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 SCJ40X275-10 Is Used
Commissioning & Setup
The 10 mm adjustment screw lets technicians fine-tune the actuator's end-of-stroke position during initial machine setup, eliminating the need to shim or reposition the cylinder body for perfect alignment with tooling.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke can be used to take up mechanical wear on contact surfaces over time. A simple turn of the screw restores the correct clamping position without replacing the cylinder.
Format Changeover
On packaging or sorting lines that handle different product sizes, the SCJ40X275-10 allows operators to quickly adjust the pusher stroke end to match a new box or tray dimension, reducing changeover downtime.
Is the Airtac SCJ40 Standard Cylinder SCJ40X275-10 the Right Cylinder?
Step up to the SCJ50 series if your load demands more force; the 50 mm bore provides 982 N of push at 0.5 MPa. For applications where the stroke is fixed and never needs adjustment, the standard SC40 series is a more cost-effective choice. This SCJ40X275-10 is a direct dimensional replacement for an existing AirTAC SCJ adjustable-stroke cylinder with a 40 mm bore, 275 mm nominal stroke, and a 10 mm adjustment range, with PT ports and basic mounting. At a 275 mm stroke, ensure the rod is adequately supported if significant side loads are present, or consider an external guide rail to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ40X275-10 FAQ
At an operating pressure of 0.5 MPa, the push force is 628 N and the pull force is 528 N. The push force is greater than the pull force because it is a single-rod cylinder, where the piston rod reduces the effective area on the retract side.
The SCJ40X275-10 has a longer body to house the adjusting mechanism, so it is not a direct drop-in replacement for a fixed-stroke SC cylinder of the same stroke. It is a direct replacement for another AirTAC SCJ40 cylinder with a 275 mm nominal stroke and a 10 mm adjustment range.
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