Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 170mm 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
- Stroke170 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-40
The AirTAC SAIJ125X170-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 130 to 170 mm, allowing you to dial back the nominal 170 mm stroke by up to 40 mm during commissioning without adding external stops. Built with a SUS420J2 stainless steel rod, it delivers 6136 N of push force at 0.5 MPa.
This model utilizes PT tapered port threads and includes variable air cushions at both ends to manage deceleration. The extruded aluminum barrel incorporates sensor grooves on both sides, enabling direct mounting of CMSE reed or DMSE electronic switches if a magnet is specified later. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 170 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 SAIJ125AX170-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×170 | 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 SAIJ125AX170-40 Is Used
Variable End-Stop Positioning
Dial in the exact retract distance between 130 and 170 mm on packaging equipment to accommodate varying carton sizes without swapping hardware.
Machine Changeover Setup
Fine-tune the end position during product line changeovers, using the 40 mm rear adjustment window to rapidly align tooling without external spacers.
Heavy-Duty Assembly Pressing
Leverage the 6136 N push force at 0.5 MPa for pressing operations, adjusting the stroke to control the exact depth of engagement for different parts.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-40 the Right Cylinder?
Select this 125 mm bore cylinder when an application requires substantial thrust (6136 N at 0.5 MPa) alongside precise end-position tuning. If your process needs less force, stepping down to a 100 mm bore yields 3927 N, while a 160 mm bore provides 10053 N for heavier loads. Choose the SAIJ adjustable version over a fixed SAI cylinder when accommodating product size changeovers or fine-tuning machine setup.
When matching this ISO 15552 dimensionally interchangeable cylinder, verify the 170 mm stroke, 40 mm adjustment, PT ports, and mounting style. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider an external rod lock, SAIL, or BSAI. Since the stroke is under 300 mm, side-load stress is moderate, but an external guide remains recommended for heavy 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 SAIJ125AX170-40 FAQ
The rear adjuster screw allows you to shorten the effective travel from the 170 mm nominal stroke down to 130 mm, providing a 40 mm tuning window. It acts as a mechanical stop to set the end position and does not lock the load without live air pressure.
At a 0.5 MPa operating pressure, the SAIJ125X170-40 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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