Airtac SAIJ125 Adjustable Cylinder SAIJ125BX100-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX100-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 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 SAIJ125BX100-30S
The AirTAC SAIJ125X100-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 70-100 mm usable travel window from its 100 mm nominal stroke. Equipped with a SUS304 stainless steel rod and a PT tapered port, it delivers 6136 N of push force at 0.5 MPa. This bore uses a 40 mm variable air cushion at both ends to manage deceleration across its 30-500 mm/s speed range.
Because the external rear screw acts purely as a travel stop, it allows precise end-position tuning during commissioning without adding external stops or swapping the cylinder. The integrated magnet supports AirTAC CMSE reed and DMSE electronic sensors fitted into the dual-side barrel grooves, while the reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) omits heavy rear pivot options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX100-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX100-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125BX100-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125BX100-30S Is Used
Machine Changeover
Dial in the 70-100 mm travel window during product size transitions without physically swapping the actuator.
End-Position Tuning
Fine-tune the retract stop at commissioning to dial out mechanical tolerance and achieve exact positioning.
Heavy Forming Setup
Leverage the 6136 N push force for pressing operations while adjusting the stroke to protect tooling.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX100-30S the Right Cylinder?
Select this 125 mm bore when an application requires substantial thrust—stepping down to an 80 mm bore drops the 0.5 MPa push force to 2513 N, whereas this size provides 6136 N. Choose the SAIJ adjustable format over a fixed SAI when a machine requires variable end-stops to accommodate product changeovers. For any load-holding requirements without live air pressure, note that the rear adjuster is not a lock; consider the SAIL or BSAI series instead. To match this ISO 15552 replacement exactly, specify the 125 mm bore, 100 mm stroke, 30 mm adjustment, PT port, SUS304 rod, and the -S magnet.
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 SAIJ125BX100-30S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can deliver up to 11045 N of push force at 0.9 MPa.
The rear adjuster screw lets you shorten the 100 mm nominal stroke by up to 30 mm, creating a usable 70-100 mm travel window. It functions as a physical stop for end-position tuning, not as a lock.
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