Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 70mm 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
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-20
The AirTAC SAIJ100X70-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 3927N of push force at 0.5 MPa and provides a usable travel window of 50 to 70mm, allowing you to dial back the 70mm nominal stroke by up to 20mm during commissioning. This built-in adjustability eliminates the need to swap cylinders or bolt on external stops when fine-tuning end positions.
This specific configuration features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for mounting CMSE reed or DMSE electronic switches. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB and rear pivot options.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 70 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 SAIJ100BX70-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×70 | 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 SAIJ100BX70-20 Is Used
Machine Changeover
Dial in the 50-70mm travel window on the fly to accommodate different product sizes without physically replacing the cylinder or adding external shims.
End-Position Tuning
Fine-tune the retract end-stop during commissioning to perfect the seating of heavy 100mm bore tooling, absorbing setup tolerances directly at the rear screw.
High-Force Positioning
Leverage 3927N of thrust at 0.5 MPa to push heavy pallets into a workstation, using the adjustable stroke to compensate for pallet wear or varying load dimensions.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-20 the Right Cylinder?
Select this 100mm bore cylinder when an application requires high force (3927N push at 0.5 MPa) alongside precise end-position tuning. If your setup needs less force, stepping down to an 80mm bore yields 2513N of push force. Choose the SAIJ adjustable-stroke variant over a fixed SAI model when you need variable end-stops for product changeovers. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding without pressure, consider an external rod lock, SAIL, or BSAI cylinder.
For ISO 15552 replacement matching, ensure the target unit shares the 100mm bore, 70mm stroke, 20mm adjustment range, PT G1/2 port, and the specified mounting style. Because the 25mm rod and M20x1.5 rod thread handle significant side loads, always verify your guiding structure, especially since this model operates at speeds of 30-800 mm/s.
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 SAIJ100BX70-20 FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the 70mm nominal stroke by up to 20mm, creating a usable travel window of 50 to 70mm. It only sets the travel end and does not lock or hold the load without continuous air pressure.
At a 0.5 MPa operating pressure, the SAIJ100X70-20 provides 3927N of push force and 3681N of pull force. It can deliver up to 7068N of push force at the maximum 0.9 MPa pressure.
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