Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-75S
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX85-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 85mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ40 mm
- Stroke85 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-75S
The AirTAC SAIJ40X85-75-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 85 mm stroke but integrates an external adjusting screw that allows you to trim the effective travel back by up to 75 mm. This creates a highly versatile 10 to 85 mm usable stroke window, letting you fine-tune the retract end position at commissioning without swapping the cylinder or adding external stops.
This variant is equipped with a SUS420J2 stainless steel rod (option A) for improved corrosion resistance over standard carbon steel. It includes a magnet for position sensing, compatible with AirTAC CMSE reed and DMSE electronic switches fitted into the dual-side sensor grooves on the extruded aluminum barrel. The fluid porting uses PT tapered threads (G1/4), and the standard mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 accessories.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 85 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×85 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-75S Is Used
Product Changeover Tuning
Dial in the exact retract distance from 10 to 85 mm on the fly when switching packaging sizes on a line, eliminating the need to physically swap cylinders for different format parts.
Machine Setup Calibration
Use the rear stopper screw to micro-adjust the end position during initial commissioning, ensuring perfect alignment of clamps and pushers without adding external mechanical stops.
Variable End-Stop Positioning
Ideal for testing fixtures and automated assembly rigs where the effective stroke needs to be frequently altered and locked in place to test different component insertion depths.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-75S the Right Cylinder?
The SAIJ40X85-75-S is specified with a PT port thread, an SUS420J2 stainless steel rod, and a magnet for CMSE/DMSE sensors. Ensure you match these exact attributes when replacing an ISO 15552 cylinder to maintain footprint and mounting interchangeability.
Because the adjustment range is vast (up to 75 mm on an 85 mm stroke), this cylinder effectively replaces multiple fixed-stroke units during machine setup or product changeover. Remember that the rear adjuster acts purely as a travel stop to decelerate and set the end position; it does not lock or hold the load without live air pressure. For true fail-safe load holding, consider the SAIL or BSAI series instead.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-75S FAQ
At 0.7 MPa, the push force increases to 879 N.
The rear adjusting screw allows you to shorten the 85 mm nominal stroke by up to 75 mm, providing a usable travel window of 10 to 85 mm. The adjuster acts as a mechanical stop to set the end position and relies on the air cushion for deceleration; it does not hold the load without live air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.