Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 950mm 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
- Stroke950 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-40S
The AirTAC SAIJ80X950-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window down from 950 mm to a 910-950 mm range. It delivers a robust 2513 N of push force at 0.5 MPa, making it well-suited for moving heavy jigs or workpieces on automated lines. The barrel is an extruded aluminum profile with sensor grooves on both sides, distinguishing it from tie-rod designs.
This specific SKU is built with a SUS304 stainless steel rod (code B) for corrosion resistance and includes a magnet (-S) for position sensing with AirTAC CMSE reed or DMSE electronic switches. The rear adjuster acts purely as a mechanical stop to dial in the end position during commissioning; it does not lock or hold the load without live air pressure. For load-holding applications without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 950 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 SAIJ80BX950-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×950 | 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 SAIJ80BX950-40S Is Used
Machine Changeover
Dial in the retract stop from 950 mm down to 910 mm during product size transitions, avoiding the need to physically swap cylinders or re-machine external stopper blocks.
Long-Stroke Diverting
Actuate large diverters or heavy pallet stops over a 910-950 mm range, using the 2513 N thrust at 0.5 MPa to push substantial loads reliably.
End-Position Calibration
Fine-tune the final retract position during machine commissioning to achieve exact alignment with downstream processes, using the 40 mm adjustment window.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX950-40S the Right Cylinder?
Choose this 80 mm bore when 50 mm (982 N push at 0.5 MPa) is too weak but stepping up to 100 mm (3927 N) would be oversized. The adjustable 40 mm end-stop is ideal for product changeovers where exact end-position tuning is needed without machining external stops or swapping a fixed-stroke SAI cylinder. Because the usable stroke is 910-950 mm, you can precisely set the retract distance for varying part sizes.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 950 mm stroke, 40 mm adjustment, PT tapered port threads, and the -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Given the 950 mm stroke, the 25 mm rod diameter and M20x1.5 rod thread handle high side loads, but an external guide is strongly recommended for this long unsupported travel to prevent premature seal wear.
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 SAIJ80BX950-40S FAQ
At a 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the nominal 950 mm stroke by up to 40 mm, resulting in a usable travel window of 910-950 mm. It only sets the end position and does not lock the load without live air pressure.
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