Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 500mm 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
- Stroke500 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-40
The AirTAC SAIJ80X500-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 2513N push force at 0.5 MPa and provides a usable travel window of 460 to 500 mm, letting you dial back the nominal 500 mm stroke by up to 40 mm during commissioning. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This specific configuration incorporates a SUS304 stainless steel rod (material code B) for superior corrosion resistance and utilizes PT tapered port threads. It achieves standard speeds of 30-800 mm/s and relies on variable air cushions at both ends to decelerate the load smoothly. The rear stopper sets the end position but does not lock the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 500 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 SAIJ80BX500-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×500 | 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 SAIJ80BX500-40 Is Used
Product Size Changeovers
Quickly reconfigure the retract distance by up to 40 mm when running a new product batch, eliminating the need to physically swap out the entire cylinder assembly.
Machine Setup Commissioning
Fine-tune the end-of-stroke position during initial machine build to perfectly dial in mechanical timing without machining new hard stops.
Variable End-Stop Positioning
Act as an adjustable physical stop for parts moving along a conveyor, accommodating different product lengths within the 460 to 500 mm travel window.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX500-40 the Right Cylinder?
Choose this 80 mm bore when an application demands higher thrust than a 63 mm cylinder (which provides 1559N push at 0.5 MPa) but without the bulk of a 100 mm unit. The adjustable 460-500 mm window is ideal for product-size changeovers on a line, allowing operators to fine-tune the retract end-position without swapping cylinders or adding external stops. For fixed-travel needs without commissioning tweaks, the standard SAI series is sufficient.
When specifying an ISO 15552 replacement, match the 80 mm bore, 500 mm stroke, 40 mm adjustment, PT port thread, and mounting style. Because the stroke is 500 mm, the M20x1.5 rod thread and 25 mm rod diameter should be paired with an external guide to prevent excessive side-loading on the piston. Note that the SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. If the machine requires true load-holding without live air, select a SAIL or BSAI cylinder instead.
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 SAIJ80BX500-40 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.7 MPa, the push force increases to 3518N.
The rear adjuster acts as a mechanical stop that shortens the effective travel. For this SAIJ80X500-40, you can trim the 500 mm nominal stroke back by up to 40 mm, creating a usable travel window of 460 to 500 mm. It functions as a stop, not a lock, and requires live air to hold the load.
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