Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-75 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 SAIJ40BX165-75
The AirTAC SAIJ40X165-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down from the 165 mm nominal stroke by up to 75 mm, creating a precise 90-165 mm usable window. Delivering 628 N of push force at 0.5 MPa, this 40 mm bore unit is built with a SUS304 stainless steel rod for superior corrosion resistance and runs on filtered air via PT tapered ports.
This adjustable model omits the FB, CA, CB and CR mounts, offering a focused mounting set of Basic, FA, LB, TC, FTC, TCM1 and TCM2. Because the rear adjuster acts purely as a mechanical stop and the air cushions handle deceleration, neither will hold a load statically without live air pressure; for true load-holding without supply pressure, consider a SAIL or BSAI series cylinder instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-75 |
|---|---|
| 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 SAIJ40BX165-75
| 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 SAIJ40BX165-75 Is Used
Machine Setup & Changeover
Dial in the exact 90 to 165 mm end-position during product family changeovers without replacing the actuator or bolting on external stops.
Variable End-Stop Positioning
Adjust the retract stroke on the fly for packaging lines handling different carton sizes, using the 75 mm trim range to adapt the reject arm.
Corrosive Environment Assembly
Leverage the SUS304 stainless steel rod for light assembly tasks in food or chemical washdown areas requiring precise stroke tuning.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-75 the Right Cylinder?
Choose this 40 mm bore cylinder when your setup requires variable end-stops or frequent product changeovers, allowing you to dial in the exact 90-165 mm stroke at commissioning without swapping hardware or adding external stops. If your application demands less force, stepping down to the 32 mm bore yields 402 N at 0.5 MPa, while moving up to the 50 mm bore provides 982 N. For a fixed travel requirement without the adjustment screw, the standard SAI series is the direct alternative.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 165 mm stroke, 75 mm adjustment range, PT port thread, and your required mounting option. Note that because the total travel reaches 165 mm, ensure adequate side-load protection by using an external guide rail to prevent rod binding, as the 16 mm rod and M12x1.25 thread can only support moderate lateral 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 SAIJ40 Adjustable Cylinder SAIJ40BX165-75 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
The rear adjuster screw acts as a mechanical stop that lets you trim the effective travel back from the 165 mm nominal stroke by up to 75 mm, resulting in a 90-165 mm usable window. It only sets the end position and does not lock the load without live air pressure.
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