Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 135mm 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
- Stroke135 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-100S
The AirTAC SAIJ40X135-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628 Newtons of push force at 0.5 MPa and features a generous 100 mm adjustment range, creating a usable travel window of 35 to 135 mm. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet pairs directly with AirTAC CMSE reed and DMSE electronic solid-state switches for precise position detection.
Built for demanding environments, this specific configuration utilizes a SUS304 stainless steel rod (code B) for superior corrosion resistance. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position during commissioning without needing external stops; it does not lock or hold the load without live air pressure. Pneumatic connections use PT tapered threads, and the standard variable air cushions at both ends handle end-of-stroke deceleration.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 135 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 SAIJ40BX135-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×135 | 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 SAIJ40BX135-100S Is Used
Product Changeover Lines
Leverage the 35-135 mm travel window to accommodate varying product lengths on the same conveyor without physically swapping out cylinders during line changeovers.
Commissioning End-Stop Tuning
Dial in the exact retract position during machine setup using the rear adjuster, avoiding the need to machine custom spacer blocks or add external mechanical stops.
Corrosive Environment Testing
Rely on the SUS304 stainless steel rod for positioning and clamping tasks in environmental chambers or washdown areas where standard carbon steel rods would fail.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-100S the Right Cylinder?
Choose this 40 mm bore when an application requires approximately 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore (402 N) if you need more authority, or down from a 50 mm bore (982 N) to save space. The 100 mm adjustment range is exceptionally wide, allowing a single cylinder to handle multiple product sizes on a changeover line by simply dialing back the retract stop from 135 mm down to 35 mm. If your setup requires the load to be held mechanically without continuous air pressure, a standard SAIJ is insufficient and you should look toward the SAIL pneumatic lock or BSAI clamp-lock series.
For an exact ISO 15552 dimensional replacement, match the 40 mm bore, 135 mm stroke, 100 mm adjustment code, PT port threads, and the -S magnet option. Mounting choices are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the total stroke is 135 mm, side loading is minimal, but always ensure the M12x1.25 rod thread is properly aligned with your load coupling to prevent binding.
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 SAIJ40BX135-100S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 Newtons of push force and 528 Newtons 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 shorten the effective stroke from its 135 mm nominal length down to as little as 35 mm. It only sets the travel end point and does not lock the load without live air pressure.
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