Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-50S
The AirTAC SAIJ125X105-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 55-105 mm. Delivering 6136 N of push force and 5734 N of pull force at 0.5 MPa, it handles heavy-duty positioning with precision. The built-in magnet allows seamless integration with CMSE reed and DMSE electronic sensors for exact end-of-travel detection.
This model features a carbon steel rod and PT tapered port threads. Unlike fixed-stroke SAI units, the external rear stopper lets you dial in the exact retract position during commissioning or product changeover without swapping the cylinder. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 105 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 SAIJ125X105-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×105 | 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 SAIJ125X105-50S Is Used
Heavy Pressing Operations
Dial in the exact 55-105 mm pressing distance for bearings or heavy assemblies, fine-tuning the end stop during setup without changing the cylinder.
Product Size Changeovers
Quickly adapt a packaging line to different carton depths by adjusting the rear stopper up to 50 mm, eliminating the need to swap out pneumatic hardware.
Variable End-Stop Forming
Execute heavy-duty metal forming or bending tasks where the precise bottom dead center must be adjusted on the machine floor to accommodate material variance.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-50S the Right Cylinder?
Choose this 125 mm bore when you need substantial thrust—6136 N at 0.5 MPa—and the flexibility to trim the retract stroke by up to 50 mm on the fly. If your application requires less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, while moving up to a 160 mm bore provides 10053 N. The PT tapered port ensures a tight, mechanical pneumatic seal.
Because the rear adjuster acts purely as a mechanical stop and the air cushions only manage end-of-stroke deceleration, this SAIJ cannot hold a load without live air pressure. For fail-safe load holding, consider the SAIL (pneumatic lock) or BSAI (clamp-lock) series. For any stroke at or above 300 mm, always use an external guide to prevent rod side-loading; at 105 mm, the 32 mm rod handles standard loads well within the 30-500 mm/s speed range.
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 SAIJ125X105-50S 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 rated pressure of 1.0 MPa, it delivers up to 1251 kgf.
The rear external adjuster acts as a mechanical stop that allows you to shorten the effective stroke from 105 mm down to 55 mm. It is used for fine-tuning end positions at commissioning but does not lock the load; live air pressure is still required to hold position.
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 SAIJ125X105-50S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.