Airtac SAIJ125 Adjustable Cylinder SAIJ125BX100-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX100-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 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 SAIJ125 Adjustable Cylinder SAIJ125BX100-40S
The AirTAC SAIJ125X100-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136 N of push force at 0.5 MPa, featuring a SUS304 stainless steel rod (code B) and PT tapered ports. The built-in magnet supports CMSE reed and DMSE electronic sensors for precise position detection.
With a 40 mm adjustment range, this model provides a usable travel window of 60 to 100 mm. The rear stopper screw allows fine-tuning of the retract end position during commissioning or product changeover without adding external stops. The adjuster acts strictly as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX100-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX100-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125BX100-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125 Adjustable Cylinder SAIJ125BX100-40S Is Used
Product Changeover
Dial in the exact 60 to 100 mm retract position when switching line tooling to different package sizes without changing the cylinder.
End-Stop Calibration
Fine-tune the final end-of-stroke position during machine commissioning to absorb mechanical tolerances and set precise clamping depth.
Variable Positioning
Provide an adjustable mechanical stop for assemblies requiring flexible travel limits within the 40 mm adjustment window.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX100-40S the Right Cylinder?
Choose this 125 mm bore when your application requires 6136 N of push force (or 5734 N pull) at 0.5 MPa. If you need less force, stepping down to a 100 mm bore yields 3927 N push force. The adjustable 60-100 mm travel window is ideal for machines processing variable product sizes, replacing the need to swap fixed-stroke SAI cylinders. For load-holding without continuous air, select a SAIL or BSAI cylinder instead.
This SAIJ configuration uses a SUS304 stainless steel rod for corrosion resistance and includes a magnet for DMSE solid-state sensors. It supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. The 125 mm bore operates at 30-500 mm/s. Since the 100 mm stroke is below 300 mm, side-load risks are minimal, but external guides are still recommended for heavy 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 SAIJ125 Adjustable Cylinder SAIJ125BX100-40S FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 40 mm, creating a usable travel window of 60 to 100 mm. It acts as a mechanical stop to fine-tune the end position and is not a lock.
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa the push force increases to 8590 N.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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