Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 165mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke165 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-30S
The AirTAC SAIJ40X165-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 30 mm. This yields a usable window of 135 to 165 mm, enabling precise end-position tuning at commissioning without swapping out the unit or adding external stops. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
This specific SKU is built with a SUS304 stainless steel rod (option B) for superior corrosion resistance and ships with a magnet (-S) for position sensing. The extruded aluminum barrel includes sensor grooves on both sides, directly supporting AirTAC CMSE reed and DMSE electronic solid-state switches. It uses a PT tapered G1/4 port and relies on variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 165 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 | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×165 | 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 SAIJ40BX165-30S Is Used
Changeover Dial-In
Perfect for packaging lines that handle varying carton sizes, letting operators quickly adjust the 135-165 mm travel window without replacing hardware.
End-Stop Tuning
Ideal for assembly stations where the final approach distance needs micro-adjustments during initial commissioning to prevent part crushing.
Sensor-Ready Actuation
The integrated magnet and dual sensor grooves make it ready for DMSE electronic switches in automated welding or clamping cells.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-30S the Right Cylinder?
Choose this 40 mm bore when an application requires roughly 628 N of push force at 0.5 MPa, which neatly bridges the gap between the smaller 32 mm bore (402 N) and the larger 50 mm bore (982 N). The adjustable stroke is highly beneficial during machine setup or product changeover, allowing operators to dial in the exact end-stop rather than machining custom spacers. For any load-holding requirements without live air pressure, note that the rear adjuster acts only as a travel stop, not a lock; you should look toward the SAIL or BSAI series instead.
To match this ISO 15552 replacement exactly, verify the 40 mm bore, 165 mm nominal stroke, 30 mm adjustment range, PT G1/4 port, and the -S magnet option. The SAIJ mounting set omits FB, CA, CB, and CR attachments, offering Basic, FA, LB, TC, FTC, TCM1, and TCM2 interfaces. Because the 16 mm rod and M12x1.25 thread handle side loads well, this cylinder operates reliably within the standard 30-800 mm/s speed range.
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 SAIJ40BX165-30S FAQ
At a 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. If you step up to 0.7 MPa, the push force increases to 879 N.
The rear external stopper screw lets you shorten the 165 mm nominal stroke by up to 30 mm, creating a usable travel window of 135 to 165 mm. This allows fine-tuning of the retract end position without adding external stops.
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