Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-100 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 SAIJ125AX170-100
The AirTAC SAIJ125X170-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. With a nominal stroke of 170 mm and a 100 mm adjustment range, it provides a flexible 70-170 mm usable travel window for exact end-position tuning during commissioning. It delivers 6136 N of push force at 0.5 MPa and operates at speeds of 30-500 mm/s.
This model features a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and uses PT tapered port threads. The rear adjuster acts purely as a travel stop to decelerate the load, so it does not hold position without live air pressure. For load-holding requirements, an external pilot-operated check valve or the SAIL/BSAI locking variants should be used instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-100 |
|---|---|
| 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 SAIJ125AX170-100
| 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 SAIJ125AX170-100 Is Used
Product Changeover
Dial in the 70-170 mm travel window during format changes on packaging lines without replacing the cylinder.
End-Stop Tuning
Fine-tune the retract position precisely at commissioning using the rear screw stopper to perfect machine timing.
Heavy Forming
Leverage the 6136 N push force at 0.5 MPa for pressing and forming tasks that require variable end positions.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-100 the Right Cylinder?
Select this 125 mm bore when an 80 mm cylinder (providing 2513 N push at 0.5 MPa) lacks sufficient thrust, but a 160 mm bore is physically oversized. The integrated 100 mm adjustment range is ideal for machinery requiring frequent product-size changeovers, eliminating the need to swap cylinders or bolt on external stops. Since the stroke is 170 mm, side loads are minimal, but external guiding is recommended if handling heavy radial loads.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 170 mm nominal stroke, 100 mm adjustment, PT port threads, and the SUS420J2 rod material. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. No magnet is specified, so position sensing requires external switches or upgrading to an -S model.
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 SAIJ125AX170-100 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster allows you to trim the effective travel anywhere within a 70 to 170 mm window. It functions as a mechanical stop to set the end position and does not lock the load without live air pressure.
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Standard models usually ship in 3-4 days.
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