Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 130mm 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
- Stroke130 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-20S
The AirTAC SAIJ125X130-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a substantial 8590N push force at 0.7MPa, placing it in a heavy-duty force class for large actuators. The built-in magnet enables position sensing with CMSE reed and DMSE electronic solid-state switches mounted in the dual-side sensor grooves.
This specific SKU features a 130mm nominal stroke paired with a 20mm adjustment mechanism, creating a usable travel window of 110-130mm. You can fine-tune the retract end-position at commissioning without swapping the barrel or adding external stops. The extruded aluminum profile body uses a PT tapered port thread, and the adjustable stopper serves purely as a travel end-limit, not a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 130 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 SAIJ125X130-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×130 | 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 SAIJ125X130-20S Is Used
Product Size Changeovers
Quickly dial the end-of-stroke position back by up to 20mm when a production line switches to a different package size, avoiding physical cylinder replacement.
Heavy-Duty Pressing
Leverage the 8590N push force at 0.7MPa for heavy assembly operations while trimming the travel window to perfect the pressing depth.
Machine Commissioning
Fine-tune the 110-130mm travel window during initial setup to perfect mechanical timing without machining custom external stopper blocks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-20S the Right Cylinder?
Select this 125mm bore when an application requires high thrust that smaller neighbors cannot provide; for context, a 100mm bore yields 5497N push at 0.7MPa, while stepping up to a 160mm bore offers 14074N. Choose this adjustable-stroke SAIJ over a fixed SAI when you need precise end-stop tuning during machine setup or product-size changeovers. It uses the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets. For exact ISO 15552 replacement matching, verify the 125mm bore, 130mm stroke, 20mm adjustment, PT port, and -S magnet. If your process requires holding a load without live air pressure, note that this rear adjuster is only a stop; you must use a SAIL pneumatic lock, BSAI clamp-lock, or external rod lock instead.
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 SAIJ125X130-20S FAQ
This 125mm bore cylinder provides 6136N push and 5734N pull at 0.5MPa, scaling up to 8590N push and 8010N pull at 0.7MPa, with a maximum thrust of 11045N at 0.9MPa.
A rear stopper screw lets you shorten the 130mm nominal stroke by up to 20mm, yielding a usable 110-130mm travel window. It acts only as a travel end-limit and does not hold the load without live air pressure.
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