Airtac SAIJ125 Adjustable Cylinder SAIJ125BX90-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX90-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 90mm 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
- Stroke90 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 SAIJ125BX90-40
The AirTAC SAIJ125X90-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits a usable travel window of 50 to 90 mm. It delivers a robust 6136 N pull force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks.
This variant incorporates a SUS304 stainless steel rod for superior corrosion resistance and operates at speeds of 30-500 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, while the rear stopper mechanism allows precise end-position tuning during commissioning without adding external stops.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX90-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX90-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 90 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 SAIJ125BX90-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×90 | 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 SAIJ125BX90-40 Is Used
Machine Setup Changeovers
Dial in the exact 50-90 mm retract position during product-size changeovers without physically swapping the cylinder or bolting on external stopper blocks.
Heavy-Duty Positioning
Leverage the 6136 N pull force at 0.5 MPa to move heavy jigs into place, using the rear screw to fine-tune the final end-stop location during initial commissioning.
Variable End-Stop Tuning
Adjust the effective stroke by up to 40 mm on the fly to compensate for mechanical wear or slight misalignments in heavy-duty automated assembly lines.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX90-40 the Right Cylinder?
Select this 125 mm bore cylinder when an application demands high thrust but requires fine-tuning of the retract position across a 50-90 mm window, stepping up from a 100 mm bore that provides 3681 N pull at 0.5 MPa. An adjustable stroke is ideal for machine setups requiring variable end-stops or product-size changeovers, avoiding the need to swap out a fixed-stroke SAI cylinder.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 90 mm stroke, 40 mm adjustment, PT tapered G1/2 port, and the SUS304 (B) rod material. Note that the rear adjuster functions strictly as a travel stop and does not hold the load without live air; for pilot-operated load-holding, consider the SAIL or BSAI series. Mounting options include the reduced SAIJ set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125BX90-40 FAQ
The rear adjuster acts as a mechanical stopper that lets you shorten the nominal 90 mm stroke by up to 40 mm, providing a usable travel window of 50 to 90 mm. It only sets the travel end and decelerates the load; it does not lock or hold the load without live air pressure.
At an operating pressure of 0.5 MPa, the SAIJ125X90-40 delivers a push force of 6136 N and a pull force of 5734 N. It operates at speeds ranging from 30 to 500 mm/s.
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1-Year Warranty
Covers non-human-caused product damage.
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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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