Airtac SAIJ125 Adjustable Cylinder SAIJ125BX150-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX150-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 150mm 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
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX150-75S
The AirTAC SAIJ125X150-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 6136N of push force at 0.5MPa and provides a usable travel window of 75-150mm, allowing you to dial back the nominal 150mm stroke by up to 75mm during commissioning. This built-in adjustability eliminates the need to swap cylinders when tuning end positions.
Equipped with a SUS304 stainless steel rod and a PT tapered port, this model includes a magnet for CMSE and DMSE sensors. The extruded aluminum barrel integrates sensor grooves on both sides, and the adjustable stopper functions purely as a travel end limiter, not a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX150-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX150-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAIJ125BX150-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SAIJ125BX150-75S Is Used
Variable End-Stop Tuning
Dial in the exact retraction point within the 75-150mm window during machine setup, providing precise positioning without machining new hard stops.
Product-Size Changeovers
Quickly adapt a production line to different part lengths by turning the rear adjuster, saving time and avoiding cylinder replacement.
Heavy Load Positioning
Leverage the 6136N push force at 0.5MPa to move heavy assemblies, using the adjustable stroke to fine-tune the final resting position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX150-75S the Right Cylinder?
Choose this 125mm bore when you need heavy thrust up to 6136N at 0.5MPa, stepping up from a 100mm bore that yields 3927N. The 75mm adjustment range is exceptionally wide, making it ideal for product-size changeovers on a line without adding external stops. If your application requires holding a load without live air pressure, select the SAIL or BSAI series instead, as the SAIJ rear adjuster only sets the travel end.
For ISO 15552 replacement matching, verify the 125mm bore, 150mm stroke, 75mm adjustment, PT port, and the -S magnet. Because the stroke is 150mm, side-load is moderate, but always ensure proper external guiding for heavy loads. The supported mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ125BX150-75S FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke from its nominal 150mm down to as little as 75mm. It is a travel limiter, not a lock, and does not hold the load without live air pressure.
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