Airtac SAIJ100 Adjustable Cylinder SAIJ100BX25-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX25-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 25mm 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.
- BoreØ100 mm
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX25-20
The AirTAC SAIJ100X25-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a robust 5497N push force at 0.7MPa, paired with a 25mm nominal stroke that can be dialed back by up to 20mm. This creates a highly versatile 5-25mm usable travel window, allowing you to fine-tune the retract end-position at commissioning without adding external stops.
This model is equipped with a SUS304 stainless steel rod (option B) for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. Remember that the rear adjuster acts only as a travel stop to set deceleration endpoints; it does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX25-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX25-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 25 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100BX25-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×25 | 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 SAIJ100 Adjustable Cylinder SAIJ100BX25-20 Is Used
Precision End-Stop Tuning
Dial in the exact 5-25mm travel distance during machine commissioning to perfect the retract position without machining external stopper blocks.
Product Changeover Setup
Quickly adjust the cylinder's retract endpoint on the fly when switching between product sizes on a shared fixture, minimizing downtime.
Corrosive Assembly Press
Leverage the 3927N push force and SUS304 stainless steel rod for high-force pressing tasks in environments where moisture or corrosion is a concern.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX25-20 the Right Cylinder?
Choose this 100mm bore adjustable cylinder when your application requires substantial thrust (3927N at 0.5MPa) but demands exact end-position tuning within a short 5-25mm window. If you need less force, stepping down to an 80mm bore yields 2513N at 0.5MPa, whereas moving up to a 125mm bore provides 6136N. The adjustable rear stop is ideal for product changeovers on a line, letting you shift the end-stop without swapping the cylinder.
To replace an ISO 15552 cylinder, match the 100mm bore, 25mm stroke, 20mm adjustment, PT port threads, and the Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting set. Because this is a plain SAIJ without a magnet, it cannot host position sensors; add an -S suffix if you require CMSE reed or DMSE electronic switches. For applications needing load-holding without live air, select a SAIL or BSAI cylinder 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 SAIJ100 Adjustable Cylinder SAIJ100BX25-20 FAQ
At a 0.5MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At 0.7MPa, the push force increases to 5497N.
The SAIJ100X25-20 has a 25mm nominal stroke with a 20mm adjustment code, creating a usable travel window of 5-25mm. A rear screw stopper lets you mechanically shorten the effective stroke to fine-tune the end position without replacing the cylinder.
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