Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 850mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ63 mm
- Stroke850 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-40
The AirTAC SAIJ63X850-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 2182N of push force at 0.7 MPa and uses a G3/8 port with a 20mm carbon steel rod. The integrated adjuster allows you to fine-tune the effective travel down from the 850mm nominal stroke to a precise 810-850mm window, eliminating the need for external stops during machine commissioning.
This unit features variable air cushions at both ends and operates at speeds between 30-800mm/s. The rear adjustment screw acts purely as a travel stop for end-position tuning and does not lock the load; for position holding without live air pressure, consider the SAIL or BSAI series. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 850 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×850 | 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-40 Is Used
Variable End-Stop Machining
Dials in the exact 810-850mm retraction point during machine setup without swapping out the entire cylinder body.
Product Changeover Diverter
Adjusts the stroke on the fly to accommodate different package sizes moving along a long transfer line.
Long-Stroke Assembly Press
Provides 2182N of thrust at 0.7MPa for pressing operations while allowing fine-tuning of the bottoming position.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-40 the Right Cylinder?
Choose this 63mm bore cylinder when an application requires 2182N of push force at 0.7MPa and a long 850mm stroke that needs exact end-position trimming. If you need less force, the 50mm bore provides 1374N at 0.7MPa. If your machine requires higher thrust, stepping up to the 80mm bore yields 3518N at 0.7MPa. The 40mm adjustment window is ideal for product changeovers where the end-stop varies slightly, unlike a fixed-stroke SAI cylinder.
Because the 850mm stroke is long, the unsupported 20mm carbon steel rod is susceptible to side-loading; always use an external guide rail to prevent premature wear. To replace an ISO 15552 cylinder, match the 63mm bore, 850mm stroke, 40mm adjustment, PT port thread, and your required mounting accessory. This SKU does not include a magnet; add the -S suffix if you require CMSE reed or DMSE solid-state sensor detection.
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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-40 FAQ
At 0.5 MPa it provides 1559N push and 1402N pull force. At 0.7 MPa, the push force is 2182N, and it reaches 2805N at 0.9 MPa.
The rear adjuster screw lets you mechanically shorten the 850mm stroke by up to 40mm, creating a usable travel window of 810-850mm. This stopper only sets the end position and does not hold the load without live air pressure.
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