Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-40
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40BX500-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 500mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ40 mm
- Stroke500 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-40
The AirTAC SAIJ40X500-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 460 to 500 mm. The barrel is an extruded aluminum profile with sensor grooves on both sides, ready for CMSE or DMSE switches if a magnet is added later.
This model uses a PT tapered G1/4 port and includes variable air cushions at both ends to decelerate the payload smoothly. The rear adjustment screw functions purely as a travel stop for fine-tuning end positions during commissioning; it does not lock or hold the load without live air pressure. The mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 500 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX500-40 Is Used
Variable End-Stop Setup
Dial in the 460-500 mm travel window during machine commissioning to perfectly position parts without machining new hard stops.
Product Changeover
Quickly adjust the retract end-position on a packaging line when switching to a different product size, saving setup time.
Fine-Tune Assembly
Use the 40 mm rear adjuster to fine-tune the pressing depth of a 628 N assembly operation directly at the fixture.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-40 the Right Cylinder?
An adjustable stroke is ideal for machine setups requiring variable end-stops or product changeovers, allowing you to dial in the exact 460-500 mm travel without swapping out a fixed-stroke SAI cylinder or adding external stops.
Because the stroke is 500 mm, the 16 mm rod requires an external guide to prevent excessive side-loading and premature seal wear. For load-holding applications without live air pressure, this cylinder will not suffice; consider the SAIL series with an air-released lock or the BSAI clamp-lock variant. This SAIJ40X500-40 is dimensionally interchangeable per ISO 15552, features a PT port, and lacks a standard magnet.
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 SAIJ40 Adjustable Cylinder SAIJ40BX500-40 FAQ
The nominal stroke is 500 mm, but the rear adjuster allows you to shorten the effective travel by up to 40 mm, providing a usable window of 460 to 500 mm.
No, the SAIJ40X500-40 is double-acting and its rear screw is only a travel stop, not a lock. For load-holding without live air, use a SAIL or BSAI cylinder.
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