Airtac SCJ40 Standard Cylinder SCJ40X40-10
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X40-10 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, 40mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke40 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X40-10
The SCJ40X40-10 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap screw lets you shorten the nominal 40 mm stroke by up to 10 mm, making it ideal for commissioning fine-tuning and format changeovers without swapping the cylinder. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, with a 16 mm piston rod and PT1/4 ports.
At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N. The cylinder body length (A dimension) is 185 mm, and it includes an adjustable air cushion for smooth deceleration. This model uses the standard TPU seal for a -20 to +70 °C range and comes in a basic mount configuration, ready to accept the SCJ mounting accessory subset.
Airtac SCJ40 Standard Cylinder SCJ40X40-10 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X40-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 40 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 SCJ40X40-10
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 SCJ40X40-10 Is Used
End-Stop Fine-Tuning
The 10 mm rear adjustment screw allows operators to precisely dial in the final position of a pusher or stop gate during machine commissioning, eliminating the need for shims or external hard stops.
Wear Take-Up
In clamping or pressing fixtures, the adjustable stroke can compensate for gradual wear on tooling or contact surfaces over time, maintaining consistent clamping force without reprogramming the machine.
Small Format Changeover
Quickly adapt the cylinder stroke for different product sizes on a packaging or assembly line. The rear screw adjustment is faster than swapping out a fixed-stroke cylinder for short production runs.
Is the Airtac SCJ40 Standard Cylinder SCJ40X40-10 the Right Cylinder?
Step up to the 50 mm bore SCJ if your application requires more force, as the SCJ50 provides 982 N of push at 0.5 MPa. For a fixed-stroke solution where adjustability is not needed, the standard SC series is a direct alternative. This SCJ40X40-10 is a direct replacement for another AirTAC SCJ cylinder of the same 40 mm bore, 40 mm nominal stroke, and 10 mm adjustment range, with PT ports and basic mounting.
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 SCJ40X40-10 FAQ
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. The pull force is lower because the 16 mm piston rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 1280 N.
It can physically fit if the mounting and porting match, but the SCJ body is slightly longer to accommodate the rear adjusting mechanism. For a guaranteed drop-in replacement, match another SCJ40 cylinder with the same 40 mm stroke and 10 mm adjustment range.
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