Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 70mm 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
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-50S
The AirTAC SAIJ80X70-50-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. With a nominal 70 mm stroke and a 50 mm adjustment range, it provides a highly versatile usable travel window of 20 to 70 mm. This allows you to fine-tune the retract end-position at commissioning without swapping the cylinder or adding external stops. It delivers a robust 2513 N push force at 0.5 MPa, making it suitable for medium to heavy-duty positioning tasks.
This variant is configured with a SUS304 stainless steel rod for superior corrosion resistance and features a built-in magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors housed in the dual-side sensor grooves. The extruded aluminum barrel includes variable air cushions at both ends to manage deceleration. Remember that the rear adjuster acts as a travel stop, not a lock; this cylinder cannot hold a load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAIJ80BX70-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SAIJ80BX70-50S Is Used
Product Size Changeovers
Dial the retract stroke back by up to 50 mm during production line changeovers to accommodate different material lengths without physically repositioning the cylinder.
Commissioning End-Stop Tuning
Fine-tune the exact end-of-stroke position during machine setup to perfect timing and alignment without fabricating custom external spacers.
Corrosive Environment Testing
Leverage the SUS304 stainless steel rod and adjustable 20-70 mm travel window for precise component positioning in environments requiring high corrosion resistance.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-50S the Right Cylinder?
Choose this 80 mm bore when your application requires significantly more force than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa) but does not need the full 3927 N output of a 100 mm bore. The 50 mm adjustment code is ideal for machines that process varying product sizes, allowing the retract end-stop to be dialed back by up to 50 mm during changeovers instead of repositioning physical hard stops. When replacing an ISO 15552 cylinder, match the 80 mm bore, 70 mm stroke, PT tapered port threads, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Because the usable stroke is short (20-70 mm), side-loading is less of a concern than with longer strokes, but the 25 mm rod and M20x1.5 thread still handle robust mechanical loads.
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 SAIJ80BX70-50S FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from its nominal 70 mm down to as little as 20 mm, providing a 50 mm tuning window. It only sets the travel end and decelerates the piston; it does not lock or hold the load without live air pressure.
At a 0.5 MPa operating pressure, the SAIJ80X70-50-S provides 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, the push force increases to 5026 N.
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