Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-30 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 SAIJ125AX170-30
The AirTAC SAIJ125X170-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 170 mm nominal stroke by up to 30 mm. This creates a precise 140-170 mm usable travel window, perfect for fine-tuning end positions during commissioning without adding external stops. It delivers a robust 6136 N push force at 0.5 MPa, making it suitable for heavy-duty handling.
This SKU features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic sensors, though this specific configuration does not include a magnet. The rear adjuster acts strictly as a travel stop to set deceleration, not as a lock to hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-30 |
|---|---|
| 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 SAIJ125AX170-30
| 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 SAIJ125AX170-30 Is Used
Product Changeover Tuning
Quickly adjust the 140-170 mm travel window to accommodate new product sizes on a packaging line without disassembling the cylinder mount.
Heavy Forming End-Stop
Leverage the 6136 N force at 0.5 MPa for pressing operations while using the rear screw to precisely set the bottom dead center.
Machine Setup Calibration
Fine-tune the retract end position during initial machine commissioning to dial in exact mechanical timing without external spacers.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-30 the Right Cylinder?
Choose this 125 mm bore when 8590 N of push force at 0.7 MPa is required, or step down to the 100 mm bore (offering 5497 N at 0.7 MPa) if the load is lighter. An adjustable stroke is ideal for product changeovers where the exact end position varies slightly, eliminating the need to physically swap out a fixed-stroke SAI cylinder. For holding loads safely without continuous air pressure, select a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead, as the SAIJ adjuster is only a stop. When replacing an ISO 15552 cylinder, match the 125 mm bore, 170 mm stroke, 30 mm adjustment, PT tapered port thread, and mounting choice (Basic, FA, LB, TC, FTC, TCM1, or 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 SAIJ125AX170-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw lets you shorten the 170 mm nominal stroke by up to 30 mm, creating a 140-170 mm travel window. This allows you to set the exact retract end position during commissioning without changing the cylinder.
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