Airtac SAIJ200 Adjustable Cylinder SAIJ200AX55-20
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX55-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 55mm stroke, G3/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ200 mm
- Stroke55 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX55-20
The AirTAC SAIJ200X55-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position during commissioning. With a nominal 55 mm stroke and a 20 mm adjustment range, it provides a usable travel window of 35-55 mm without requiring external stops. This massive 200 mm bore delivers 15708 N of push force at 0.5 MPa, making it ideal for heavy-duty pressing and clamping.
This variant uses a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and pairs with PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches, though this specific SKU is configured without a magnet. The rear adjuster acts purely as a mechanical stop to set deceleration and travel limits, so it will not hold a load without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX55-20 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX55-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 55 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 50 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 (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ200 Adjustable Cylinder SAIJ200AX55-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×55 | 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 SAIJ200 Adjustable Cylinder SAIJ200AX55-20 Is Used
Heavy-Duty Pressing
Delivers 15708 N of thrust at 0.5 MPa for high-force assembly operations, with a 35-55 mm adjustable travel window to dial in exact pressing depth.
Machine Changeover
Quickly reconfigure the rear mechanical stop for new product sizes without physically replacing the cylinder or adding external spacers.
Automated Clamping
Holds heavy workpieces securely during machining while the PT tapered ports and SUS420J2 stainless rod withstand demanding industrial environments.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX55-20 the Right Cylinder?
Select this 200 mm bore cylinder when an application demands extreme thrust—up to 15708 N push at 0.5 MPa—that smaller bores cannot provide. If your force requirements are lower, stepping down to a 160 mm bore yields 10053 N of push force at the same pressure, which may better suit medium-duty tasks. The adjustable stroke is highly beneficial on machinery requiring variable end-stops or product-size changeovers, eliminating the need to swap out a fixed-stroke SAI cylinder.
Because the 55 mm nominal stroke is relatively short, side-loading risks are minimal, but the substantial rod diameter (40 mm with an M36x2 thread) handles high axial loads well. Remember that the rear adjuster is a travel stop, not a locking mechanism; for load-holding without live air pressure, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder. This SAIJ model supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ200 Adjustable Cylinder SAIJ200AX55-20 FAQ
At a 0.5 MPa operating pressure, this 200 mm bore cylinder generates 15708 N of push force and 15080 N of pull force. It can reach up to 28274 N of push force at its maximum 1.0 MPa pressure.
The rear mechanical adjuster allows you to shorten the 55 mm nominal stroke by up to 20 mm, creating a usable travel window of 35-55 mm. This stopper sets the end position and deceleration but does not lock the load without continuous air pressure.
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