Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 190mm 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
- Stroke190 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-50
The AirTAC SAIJ125X190-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the nominal 190 mm travel back by up to 50 mm, creating a precise 140-190 mm usable window. This built-in adjustability enables fine end-position tuning at commissioning or during product changeovers without swapping the cylinder or adding external stops. It delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it suited for heavy-duty positioning tasks.
This model features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The 32 mm rod diameter and M27x2 rod thread provide robust resistance to side loads, though long unsupported strokes still require an external guide. The extruded aluminum barrel includes sensor grooves on both sides, and the cylinder operates at speeds of 30-500 mm/s with variable air cushions at both ends to decelerate the load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 190 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 SAIJ125AX190-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×190 | 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 SAIJ125AX190-50 Is Used
Variable End-Stop Positioning
Dial in the 140-190 mm stroke window during machine setup to handle varying part dimensions without physically replacing the actuator.
Product Line Changeover
Quickly adjust the retract end-position when switching a production line between different product sizes or models.
Commissioning Fine-Tuning
Trim the effective stroke by up to 50 mm on-site to perfectly align heavy 125 mm bore tooling without external mechanical stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-50 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (providing 3927 N push force at 0.5 MPa) is insufficient, but a 160 mm bore (10053 N) would be excessive overkill for your mounting footprint. The adjustable stroke is ideal for machinery that requires variable end-stops for different product sizes, replacing a fixed-stroke SAI cylinder when you need on-the-fly travel tuning rather than a locked fixed length.
Because the SAIJ125X190-50 uses PT tapered port threads, ensure your fittings match this standard. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. Note that the rear adjuster and air cushions act only as travel stops and deceleration devices; they do not hold the load without live air pressure. For fail-safe load holding, use an external rod lock or pilot-operated check valve, or select the SAIL or BSAI series.
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 SAIJ125AX190-50 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 the maximum pressure of 1.0 MPa, it delivers up to 1251 kgf.
A rear external screw stopper allows you to shorten the 190 mm nominal stroke by up to 50 mm, providing an adjustable travel window of 140-190 mm. The adjuster acts as a travel stop and does not lock or hold the load without continuous air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.