Airtac SCJ40 Standard Cylinder SCJ40X80-40S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X80-40S 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, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke80 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X80-40S
The SCJ40X80-40S is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the machine. Its rear-cap adjusting screw provides a 40 mm adjustable range, letting you dial in the exact end position without swapping the cylinder or adding external hard stops. With a 16 mm diameter piston rod and PT1/4 ports, it delivers 628 N of push force at 0.5 MPa and up to 1130 N at 0.9 MPa.
This model includes a built-in magnet (-S suffix), so standard CMSG, DMSG, or EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The body length A(SCJ) is 185 mm, and the adjustable air cushion decelerates the piston smoothly at both ends. It is a genuine AirTAC component built for commissioning trials, format changeovers, and applications where the stroke must be field-trimmed precisely.
Airtac SCJ40 Standard Cylinder SCJ40X80-40S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X80-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 80 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 SCJ40X80-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 SCJ40X80-40S Is Used
Commissioning & Setup
During machine commissioning, the 40 mm rear adjustment lets technicians fine-tune the stroke end position on the fly, eliminating the need to shim or reposition the cylinder body.
Format Changeovers
On packaging lines that switch between product sizes, the adjustable stroke allows operators to quickly reset the pusher or gate position without mechanical rework.
Wear Compensation
In clamping or pressing fixtures, the screw can be advanced slightly over time to compensate for pad wear, maintaining consistent contact force without replacing the tooling.
Is the Airtac SCJ40 Standard Cylinder SCJ40X80-40S the Right Cylinder?
Choose the SCJ40 when you need a compact 40 mm bore with field-adjustable stroke. If your load requires more force, step up to the SCJ50 (982 N push at 0.5 MPa); if space is tight and you can accept less force, the SCJ32 provides 402 N push. The SCJ is the right pick when you need to fine-tune the stroke end during setup or changeover—if your stroke is fixed and never needs adjustment, the standard SC series offers a simpler, lower-cost alternative. For strokes of 80 mm, rod bending is rarely a concern, but always align the load axially to avoid side-loading the rod bearing.
This SCJ40X80-40S directly replaces any AirTAC SCJ40 with an 80 mm nominal stroke, a 40 mm adjust range, PT ports, and a built-in magnet. Confirm that the mounting style matches your existing setup—this unit is basic mount, so use FA, LB, or TC accessories if a bracket is needed.
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 SCJ40X80-40S FAQ
At 0.5 MPa, it generates 628 N pushing and 528 N pulling. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1280 N. The pull force is lower because the 16 mm rod reduces the effective piston area on the return stroke.
Yes, if you need the adjustable stroke feature. The SCJ40X80-40S matches the SC40 mounting footprint and port size (PT1/4), but the body is slightly longer to house the adjusting screw. Ensure your machine has clearance for the rear adjustment mechanism and that the 40 mm adjust range covers your stroke variation.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SCJ Adjustable-Stroke Cylinders
Request a Quote for Airtac SCJ40 Standard Cylinder SCJ40X80-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.