Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20S
The AirTAC SAIJ80X400-20-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 400 mm nominal stroke that can be dialed back by up to 20 mm, creating a 380-400 mm usable travel window for precise end-position tuning. Delivering 4523 N of push force at 0.9 MPa, it handles heavy actuation tasks without requiring external stops.
This variant includes a magnet for position sensing and uses an SUS420J2 stainless steel rod for enhanced corrosion resistance. It features PT tapered port threads (G3/8) and an extruded aluminum barrel with sensor grooves on both sides. The rear adjuster acts strictly as a travel stop, meaning it decelerates the end of travel but will not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SAIJ80 Adjustable Cylinder SAIJ80AX400-20S Is Used
Product Changeovers
Dial in the 380-400 mm travel window during line size changes to set new end positions without physically swapping cylinders.
Heavy Pressing
Utilize the 4523 N push force at 0.9 MPa for clamping and pressing tasks that require exact end-position tuning.
Machine Setup
Fine-tune the rear stopper at commissioning to perfect the stroke length on long-stroke automated machinery.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20S the Right Cylinder?
Choose this 80 mm bore when you need more force than a 63 mm cylinder provides (1402 N pull at 0.5 MPa) but want to avoid the larger footprint of a 100 mm unit. The 20 mm adjustable stroke is ideal for machine setups requiring variable end-stops during product changeovers, eliminating the need to swap out a fixed-stroke SAI cylinder. For load-holding without continuous air pressure, use an SAIL or BSAI cylinder instead, as the SAIJ adjuster is not a lock.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 400 mm nominal stroke, 20 mm adjustment range, G3/8 PT ports, and the -S magnet requirement. Because the 400 mm stroke is relatively long, the 25 mm rod diameter should still be paired with an external guide to prevent excessive side-loading on the piston. Compatible mountings include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80 Adjustable Cylinder SAIJ80AX400-20S FAQ
It provides 2513 N of push force and 2268 N of pull force at 0.5 MPa. At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster acts as a mechanical stop that can shorten the 400 mm nominal stroke by up to 20 mm, giving a usable travel window of 380-400 mm. It does not lock the load without live air.
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.
Request a Quote for Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.