Airtac SCJ40 Standard Cylinder SCJ40X400-10
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X400-10 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, 400mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke400 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X400-10
The SCJ40X400-10 is a double-acting, single-rod pneumatic cylinder featuring a rear-cap adjusting screw that provides up to 10 mm of field-adjustable stroke-end reduction. This allows machine builders to fine-tune the stopping position without swapping the cylinder or adding external hard stops. With a 40 mm bore and a 16 mm piston rod, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it suitable for moderate-force positioning tasks.
Its 400 mm nominal stroke is well within the 1200 mm maximum standard stroke for this bore, ensuring off-the-shelf availability. The cylinder body length A(SCJ) is 185 mm plus stroke, and it incorporates a 21 mm air cushion to decelerate the piston smoothly. The standard TPU seals and PT1/4 ports suit filtered-air systems operating from -20 to +70 °C.
Airtac SCJ40 Standard Cylinder SCJ40X400-10 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X400-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 400 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 SCJ40X400-10
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 SCJ40X400-10 Is Used
Commissioning & Setup
The 10 mm rear-end adjuster lets technicians dial in the exact stroke end during initial machine setup, compensating for small assembly tolerances without re-machining brackets.
Product Stops & Diverters
Use the adjustable stroke to set a precise product stop position on a conveyor line. The 628 N push force at 0.5 MPa handles moderate-weight packages, and the stroke can be tweaked for different box sizes.
Clamping & Pressing
In a glue-press or light clamping station, the 10 mm adjustment compensates for material thickness variation or tooling wear over time, maintaining consistent clamp pressure depth.
Is the Airtac SCJ40 Standard Cylinder SCJ40X400-10 the Right Cylinder?
Select the SCJ40X400-10 when you need a 400 mm stroke with a small 10 mm adjustment window for commissioning tweaks or wear take-up. If your force requirement grows, stepping up to the SCJ50 bore delivers 982 N of push at the same 0.5 MPa. For applications where the stroke is permanently fixed and no adjustment is needed, the standard SC40X400 fixed-stroke cylinder is a simpler alternative. As a direct replacement, match the 40 mm bore, 400 mm nominal stroke, 10 mm adjust range, PT1/4 ports, and basic mounting configuration.
At this 400 mm stroke length, be mindful of side loads on the 16 mm rod. If the load is not guided externally, rod deflection can accelerate seal wear. Consider adding an external linear guide or switching to a guided cylinder if lateral forces are present in your application.
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 SCJ40X400-10 FAQ
At the standard 0.5 MPa operating pressure, it generates 628 N of push force (using the full 40 mm bore area) and 528 N of pull force (subtracting the 16 mm rod area). At the maximum 0.9 MPa operating pressure, push force reaches 1130 N.
Yes, provided the bore (40 mm), nominal stroke (400 mm), and port size (PT1/4) match. The SCJ body is slightly longer than a fixed-stroke SC to house the adjusting screw, so verify the extended body length A(SCJ) of 185 mm plus stroke fits your machine envelope.
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