Airtac SAIJ100 Adjustable Cylinder SAIJ100BX145-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX145-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX145-20
The AirTAC SAIJ100X145-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 125-145 mm, allowing you to dial back the 145 mm nominal stroke by up to 20 mm during commissioning. It delivers a robust 3927 N of push force at 0.5 MPa and 7068 N at 0.9 MPa, matching the standard SAI output class.
This variant uses a SUS304 stainless steel rod (code B) for superior corrosion resistance and is fitted with PT tapered ports. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is added later. The rear adjuster acts purely as a travel stop, meaning it decelerates the end position but cannot hold a load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX145-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX145-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 145 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 SAIJ100BX145-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×145 | 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 SAIJ100BX145-20 Is Used
Machine Changeover
Dial in the exact 125-145 mm retract position during product size transitions without swapping out the cylinder or repositioning hard stops.
End-Stop Tuning
Fine-tune the final end position during commissioning to compensate for mechanical wear or sensor drift using the rear adjustment screw.
High-Force Positioning
Leverage the 3927 N push force at 0.5 MPa to move heavy fixtures while retaining the flexibility to trim the stroke by up to 20 mm.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX145-20 the Right Cylinder?
Select this 100 mm bore when an application requires high thrust—such as 3927 N at 0.5 MPa—combined with variable end-position tuning. If you need less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, whereas moving up to a 125 mm bore provides 6136 N. Choose this adjustable-stroke model over a fixed SAI cylinder when you need to fine-tune the retract end-stop on product changeovers without adding external physical stops.
For ISO 15552 replacement matching, verify the 100 mm bore, 145 mm stroke, 20 mm adjustment range, PT port threads, and the required mounting set (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Because the stroke is under 300 mm, side-load risks are moderate, but the 25 mm rod and M20x1.5 thread provide excellent rigidity. Remember that the rear adjuster is not a lock; for load-holding without live air, consider an external pilot-operated check valve or the SAIL/BSAI series.
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 SAIJ100BX145-20 FAQ
At 0.5 MPa it provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force increases to 7068 N.
The rear adjuster screw lets you shorten the 145 mm nominal stroke by up to 20 mm, giving an effective travel window of 125-145 mm. It acts as a mechanical stop and does not lock the load without live air.
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