Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-50 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 SAIJ80BX800-50
The AirTAC SAIJ80X800-50 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 750 to 800 mm, allowing you to dial back the 800 mm nominal stroke by up to 50 mm during commissioning without adding external stops. It delivers a robust 2513 N push force at 0.5 MPa and a 4523 N push force at 0.9 MPa.
This variant uses a SUS304 stainless steel rod for superior corrosion resistance and features PT tapered port threads (G3/8). The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. The rear adjuster acts purely as a travel stop to set end positions and is not a lock; for load-holding without live air pressure, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-50 |
|---|---|
| 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 SAIJ80BX800-50
| 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 SAIJ80BX800-50 Is Used
Variable End-Stop Machining
Dial in the exact 750-800 mm travel needed for machining different part lengths without swapping out the entire cylinder.
Product Changeover Diverter
Quickly adjust the rear stopper on a packaging line to accommodate new box sizes on the fly during product changeover.
Commissioning Fine-Tuning
Perfect the final end-position during machine commissioning by trimming the stroke up to 50 mm to avoid costly mechanical shimming.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX800-50 the Right Cylinder?
Selecting this 80 mm bore model makes sense when your application requires the 2513 N thrust at 0.5 MPa, stepping up from the 50 mm bore (982 N) for heavier loads, or down from the 100 mm bore (3927 N) to save space. The adjustable stroke is chosen over a fixed SAI cylinder when you need variable end-stops for product changeovers or fine-tuning at machine setup. When specifying a replacement, match the 800 mm stroke, 50 mm adjustment, PT G3/8 port, Basic/LB/TC mounting, and SUS304 rod.
Because the stroke is 800 mm, the M20x1.5 piston rod needs external guidance to prevent excessive side-load wear on the seals. The mounting set omits FB, CA, CB, and CR options, utilizing only Basic, FA, LB, TC, FTC, TCM1, and TCM2. The air cushion at both ends helps decelerate the mass, but it does not hold the load dynamically.
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 SAIJ80BX800-50 FAQ
At 0.5 MPa operating pressure, it provides 2513 N of push force and 2268 N of pull force. At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster screw lets you shorten the 800 mm nominal stroke by up to 50 mm, creating a 750-800 mm travel window. It acts as a mechanical stop to fine-tune the end position and is not a load-holding lock.
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