Airtac SAIJ100 Adjustable Cylinder SAIJ100BX50-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX50-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 50mm 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
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX50-20
The AirTAC SAIJ100X50-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 30 to 50 mm, allowing you to dial back the 50 mm nominal stroke by up to 20 mm during commissioning without adding external stops. In this configuration, the piston rod is crafted from SUS304 stainless steel, and the ports feature PT tapered threads.
Belonging to the 100 mm bore class, it generates 3927 N of push force and 3681 N of pull force at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting options cover Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR styles found on some standard variants.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX50-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX50-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 50 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 SAIJ100BX50-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×50 | 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 SAIJ100BX50-20 Is Used
Product Changeover
Quickly fine-tune the 30-50 mm travel window on packaging lines when switching to a different carton size, avoiding physical cylinder swaps.
Machine Setup
Dial in the exact end-stop position during initial commissioning to perfect a pressing or clamping operation without external shims.
Variable End Stops
Adapt a single assembly station to multiple part lengths by adjusting the rear screw to modify the effective stroke as needed.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX50-20 the Right Cylinder?
Choose this 100 mm bore when an 80 mm cylinder (2513 N push at 0.5 MPa) lacks the necessary thrust, but a 125 mm unit is physically too large. The adjustable stroke is ideal for setups requiring precise end-position tuning during product changeovers. Because the rear adjuster acts only as a travel stop and the air cushions manage deceleration, neither will hold a load without live air pressure; for true load-holding, consider an external rod lock or the SAIL and BSAI series.
When matching ISO 15552 replacements, verify the 100 mm bore, 50 mm stroke, 20 mm adjustment range, PT port threads, and the SUS304 rod material. Since this specific SKU lacks a magnet (-S), it cannot host CMSE reed or DMSE electronic sensors without changing the piston assembly.
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 SAIJ100BX50-20 FAQ
At a 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At 0.7 MPa, the push force increases to 5497 N.
The rear adjuster screw allows you to shorten the 50 mm nominal stroke by up to 20 mm, creating a usable travel window of 30 to 50 mm. The adjuster acts as a mechanical stop and does not lock the load without live air pressure.
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