Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-50S 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 SAIJ125X190-50S
The AirTAC SAIJ125X190-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 140 to 190 mm. Delivering 6136 N of push force at 0.5 MPa, it handles heavy positioning tasks. A magnetic piston comes standard, ready for CMSE reed and DMSE solid-state sensors that mount directly into the dual-side extruded barrel grooves.
This unit features a carbon steel piston rod with an M27x2 thread and PT tapered porting. The rear adjuster acts purely as a travel stop for end-position tuning, meaning it cannot hold the load without live air pressure. For secure load-holding without continuous supply, an external pilot-operated check valve or a related SAIL pneumatic-lock model is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-50S |
|---|---|
| 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 SAIJ125X190-50S
| 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 SAIJ125X190-50S Is Used
Product Changeovers
Dial in the exact retract distance from 140 to 190 mm during product size transitions without changing cylinders or adding external stopper blocks.
Heavy Clamping
Provides 6136 N of clamping force at 0.5 MPa, using the rear stopper to precisely set the final clamp position on varying part thicknesses.
Pressing Stations
Ideal for heavy pressing tasks where the 125 mm bore handles high loads and the variable air cushions at both ends absorb the impact energy.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-50S the Right Cylinder?
Select this 125 mm bore when stepping up from a 100 mm version (which provides 3927 N at 0.5 MPa) to gain extra thrust for heavier fixtures. The 50 mm adjustment range is ideal for product changeovers, allowing you to fine-tune the retract end position without swapping the cylinder or adding external stops. Since this is a 190 mm stroke, the M27x2 rod is robust, but if your application approaches the maximum travel limits, ensure adequate external guiding to prevent side-load wear.
When matching ISO 15552 dimensions for a direct replacement, confirm the 125 mm bore, 190 mm stroke, 50 mm adjustment range, PT port threads, and the integrated -S magnet. The compatible SAIJ mounting accessories include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR configurations.
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 SAIJ125X190-50S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 8590 N push force at 0.7 MPa.
The rear adjuster screw lets you mechanically shorten the nominal 190 mm stroke by up to 50 mm, creating a 140 to 190 mm travel window. It functions as a hard stop for end-position tuning and does not lock the load without air pressure.
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Standard models usually ship in 3-4 days.
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