Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-50
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX85-50 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 SAIJ40AX85-50
The AirTAC SAIJ40X85-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to trim the effective travel back by up to 50 mm. This creates a highly flexible 35-85 mm usable window, letting you dial in the exact end position during commissioning without swapping hardware.
This configuration incorporates a SUS420J2 stainless steel rod for enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, and fluid supply connects via PT G1/4 tapered ports. It is a true profile cylinder, dimensionally interchangeable per ISO 15552, and utilizes a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-50 |
|---|---|
| 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 SAIJ40AX85-50
| 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 SAIJ40AX85-50 Is Used
Machine Commissioning
Perfect for prototype machinery where the exact retract distance is unknown, allowing operators to trim the 85 mm stroke back by up to 50 mm to find the optimal operating window.
Product Changeover
Ideal for packaging lines that run multiple product sizes, letting technicians quickly adjust the end-stop without disassembling the cylinder or adding shims.
Precision Clamping
Provides 628 N of clamping force at 0.5 MPa with the ability to fine-tune the material contact point, ensuring delicate parts are not crushed.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-50 the Right Cylinder?
Choose this 40 mm bore when an application demands a nominal 85 mm stroke but requires significant downstream fine-tuning; its 50 mm adjustment range is ideal for prototyping or product-size changeovers. If your setup needs less force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa, while moving up to a 50 mm bore provides 982 N. Because the stroke is under 300 mm, side-load stress on the 16 mm rod is minimal, though external guides remain recommended for heavy off-center loads.
The rear adjuster acts strictly as a mechanical stop to set the retract position, not as a locking device. The cylinder cannot hold a load without live air pressure; for true pneumatic locking without continuous air supply, consider the AirTAC SAIL or BSAI series instead. To match this exact unit for an ISO 15552 replacement, specify the 40 mm bore, 85 mm stroke, 50 mm adjustment, PT G1/4 port, SUS420J2 rod, and the required mounting bracket.
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 SAIJ40AX85-50 FAQ
If operated at 0.7 MPa, the push force increases to 879 N.
A rear-mounted screw acts as a mechanical stop, allowing you to shorten the nominal 85 mm stroke anywhere within a 35-85 mm usable window. It sets the travel end and relies on the air cushion for deceleration, but it does not lock the load without continuous air pressure.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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