Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 800mm 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
- Stroke800 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-40
The AirTAC SAIJ80X800-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 2513N of push force at 0.5 MPa and utilizes a PT G3/8 port. The defining feature of this SKU is its 40mm adjustment range, which creates a usable travel window of 760-800mm. This allows you to dial back the end-of-stroke position precisely at commissioning without swapping out the entire cylinder.
This model incorporates a SUS304 stainless steel piston rod (option B) for superior corrosion resistance. It includes variable air cushions at both ends to decelerate the load smoothly. Note that the rear adjuster acts strictly as a mechanical stop to set travel limits; it is not a locking device and will not hold a load without live air pressure. For position holding without pressure, an external SAIL or BSAI lock is required.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 800 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 SAIJ80BX800-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×800 | 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 SAIJ80BX800-40 Is Used
End-Position Tuning
Dial in the exact retraction point within a 760-800mm window during machine commissioning to accommodate varying product lengths without adding external stopper blocks.
Product Changeover
Quickly adjust the travel distance on automated lines when switching between different package sizes, using the 40mm rear adjustment screw to set new endpoints rapidly.
Long-Stroke Assembly
Drive large clamping or lifting mechanisms requiring 2513N of force, relying on the built-in air cushions and the stainless SUS304 rod for durable, repeatable motion.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-40 the Right Cylinder?
Select this 80mm bore cylinder when an application demands 2513N of push force at 0.5 MPa and requires variable end-stops to accommodate product changeovers. The adjustable stroke is ideal for machine setups where the exact 800mm nominal travel needs to be fine-tuned backward by up to 40mm, avoiding the need to bolt on external stops. If your force requirements are lower, stepping down to a 63mm bore yields 1559N, while moving up to a 100mm bore provides 3927N.
Because this unit features an 800mm stroke, the 25mm rod diameter and M20x1.5 rod thread must manage potential side loads. For long unsupported strokes like this, guiding the load externally is critical to prevent rod binding and premature seal wear. This cylinder uses a PT tapered port thread and supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). It is dimensionally interchangeable per ISO 15552.
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 SAIJ80BX800-40 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. It can deliver up to 4523N of push force at its maximum 0.9 MPa pressure.
The rear adjuster screw allows you to shorten the effective travel from the nominal 800mm down to 760mm. This creates a 760-800mm adjustable window for fine-tuning the retract end position without replacing the cylinder.
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