Airtac SAIJ100 Adjustable Cylinder SAIJ100X550-50
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X550-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 550mm 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
- Stroke550 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X550-50
The AirTAC SAIJ100X550-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 500 to 550 mm, allowing you to dial back the nominal 550 mm stroke by up to 50 mm. This bore delivers 3927 N of push force at 0.5 MPa and utilizes a 25 mm carbon steel rod with an M20x1.5 thread.
The external adjuster acts purely as a mechanical stop for end-position tuning during commissioning; it does not hold the load without live air. For load-holding without pneumatic pressure, consider a SAIL or BSAI variant. This model includes variable air cushions at both ends and extruded aluminum barrel sensor grooves on both sides, though it ships without a magnet for CMSE or DMSE switches.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X550-50 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X550-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 550 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 SAIJ100X550-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×550 | 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 SAIJ100X550-50 Is Used
Machine Changeover
Dial in the 500-550 mm travel window during product size transitions to set new end stops without replacing the cylinder.
Commissioning Tuning
Fine-tune the retract end position at machine setup to absorb mechanical tolerances and achieve exact positioning.
Variable End Stops
Adjust the stroke dynamically on the production line to accommodate varying package sizes or material feeds.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X550-50 the Right Cylinder?
Choose this adjustable-stroke model when you need fine end-position tuning during product changeovers without swapping cylinders or adding external stops. If you need less force, the 80 mm neighbor provides 2513 N at 0.5 MPa, while stepping up to the 125 mm bore yields 6136 N. To replace an ISO 15552 cylinder, match the 100 mm bore, 550 mm stroke, 50 mm adjustment, PT G1/2 port, and your required mounting from the SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2.
Because the 550 mm stroke is long, the 25 mm rod and M20x1.5 thread will carry substantial side loads, but an external guide is still recommended for unsupported loads. Operating speed ranges from 30 to 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 SAIJ100X550-50 FAQ
At 0.5 MPa it 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 lets you shorten the 550 mm nominal stroke by up to 50 mm, creating a 500-550 mm usable travel window. The adjuster is a stop only and does not lock the load without live air.
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