Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 600mm 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
- Stroke600 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-40S
The AirTAC SAIJ125X600-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down from a 600 mm nominal stroke to a 560 mm minimum. This creates a 40 mm setup window, letting you dial in exact retract end positions during commissioning without adding external stops. It delivers a robust 6136 N pull force at 0.5 MPa, making it well-suited for moving heavy fixtures or pressing substantial masses.
Equipped with a magnetic piston (-S), this unit supports electronic DMSE and reed CMSE switches that mount directly into the extruded aluminum barrel's dual sensor grooves. The carbon steel rod and M27x2 thread provide a rigid interface for heavy loads, while the PT tapered ports ensure a tight pneumatic seal. The rear adjuster acts purely as a travel stop and works in tandem with the 40 mm air cushions at both ends to decelerate the mass smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 600 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 SAIJ125X600-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×600 | 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 SAIJ125X600-40S Is Used
Press Stroke Tuning
Dial in the exact 560-600 mm retract position during machine setup to accommodate varying material thicknesses without physically repositioning the cylinder body.
Product Changeover Stops
Quickly adjust the retract end-stop for different package sizes on a packaging line, using the 40 mm trim window to change product formats on the fly.
Heavy Fixture Retraction
Leverage the 6136 N pull force at 0.5 MPa to reliably retract heavy machining fixtures, using the built-in 40 mm air cushions to bring the 600 mm travel to a smooth stop.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-40S the Right Cylinder?
Choose this 125 mm bore when your application requires pulling forces around 6136 N at 0.5 MPa or up to 11045 N at 0.9 MPa. If your process demands less force, stepping down to a 100 mm bore yields 3681 N of pull at 0.5 MPa, whereas moving up to a 160 mm bore provides 9425 N. The adjustable 560-600 mm travel window is ideal for product changeovers on automated lines, allowing operators to reposition the retract stop without swapping the cylinder. Because the stroke is 600 mm, the extended rod is subject to leverage forces; an external guide is recommended to prevent side-loading and premature wear.
This cylinder is dimensionally interchangeable per ISO 15552 mounting interface dimensions. It uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). The rear screw is a stop, not a lock; it cannot hold a load without live air pressure. For true load-holding without continuous air, consider an AirTAC SAIL (air-released lock) or BSAI (clamp-lock) cylinder, or use an external pilot-operated check valve.
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 SAIJ125X600-40S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of pull force and 6136 N of push force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster acts as a mechanical stop that lets you shorten the 600 mm nominal stroke by up to 40 mm, providing a usable travel window of 560-600 mm. It only sets the end position and does not lock the load without live air pressure.
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