Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 155mm 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
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20
The AirTAC SAIJ100X155-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window down to 135-155 mm without swapping out the unit. It delivers a robust 7068N of push force at 0.9 MPa, making it well-suited for heavy-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides, and this specific configuration uses a SUS420J2 stainless steel rod for enhanced corrosion resistance alongside PT tapered port threads.
Because the rear adjuster acts strictly as a mechanical stop to set the end-of-travel position, it does not hold the load dynamically without live air pressure. For true load-holding requirements without continuous air, you would need to explore related series like the SAIL or BSAI. This model supports standard variable air cushions at both ends to decelerate the moving payload smoothly.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 155 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 SAIJ100AX155-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×155 | 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 SAIJ100AX155-20 Is Used
Variable End-Stop Setup
Dial in the exact 135 to 155 mm travel distance needed for different product sizes during line changeovers without adding external physical stops.
Heavy-Duty Positioning
Leverage the 7068N push force at 0.9 MPa to move and position heavy fixtures reliably while fine-tuning the final resting position at the machine.
Retrofit and Commissioning
Drop in a dimensionally interchangeable ISO 15552 profile cylinder and use the rear adjuster to perfect the end-of-stroke timing during initial machine commissioning.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20 the Right Cylinder?
Choose this 100mm bore if your application requires higher thrust than the 80mm version (which provides 4523N push at 0.9 MPa) but without stepping up to the much larger 125mm frame. The adjustable stroke is ideal for machine setups requiring variable end-stops during product changeovers, providing on-the-fly commissioning flexibility that a fixed-stroke SAI cylinder cannot match.
When integrating this cylinder, remember that the rear screw stopper and air cushions only decelerate the travel end; they do not function as a lock. To replace an existing ISO 15552 cylinder, verify the 100mm bore, 155mm stroke, 20mm adjustment range, PT port threads, and your required mounting style from the available SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2. As this unit lacks a magnet, adding position sensing requires a different configuration.
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 SAIJ100AX155-20 FAQ
At an operating pressure of 0.9 MPa, this 100mm bore cylinder generates 7068N of push force and 6626N of pull force. At 0.5 MPa, it provides 3927N push and 3681N pull.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the nominal 155mm stroke by up to 20mm. This creates a usable travel window of 135 to 155mm, but it only sets the end position and does not lock the load without live air pressure.
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