Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X135-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X135-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 135mm 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
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X135-50
The AirTAC SAIJ63X135-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 85 to 135 mm, allowing you to dial back the nominal 135 mm stroke by up to 50 mm during commissioning without adding external stops. This 63 mm bore generates 2182 N of push force and 1402 N of pull force at 0.5 MPa, matching the standard SAI output class.
The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches if a magnet is specified later. Unlike fixed-stroke SAI units, this adjustable variant uses a reduced mounting subset (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. The rear stopper screw merely sets the end position; it does not lock the load, so you must maintain live air pressure to hold position.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X135-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X135-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 135 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 SAIJ63X135-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×135 | 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 SAIJ63X135-50 Is Used
Machine Changeovers
Fine-tune the retract end-stop within the 85-135 mm window during format size changes on a packaging line, eliminating the need to physically swap cylinders between product runs.
Variable End-Stop Positioning
Dial in the exact retraction distance required for feeding different material lengths into a press, using the 50 mm adjustment range to adapt the stroke on the fly.
Assembly Station Calibration
Set precise end-of-stroke positions during initial commissioning to accommodate varying part tolerances, ensuring perfect clamping force without adding bulky external stopper blocks.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X135-50 the Right Cylinder?
Choose this 63 mm bore over the smaller 50 mm option (which yields 1374 N push at 0.5 MPa) when your process needs extra force margin, or step up to the 80 mm class (3518 N push) if moving heavier pallets. The 50 mm adjustment range is highly effective for product changeovers on packaging lines, letting operators fine-tune the retract end-position rapidly rather than swapping out an entire cylinder for a new fixed-stroke SAI unit.
When ordering, confirm the 135 mm stroke, 50 mm adjuster, G3/8 PT tapered ports, and carbon steel rod. Because the stroke here is 135 mm, an external guide is recommended to manage side loads. If your application requires true load-holding without continuous air pressure, this cylinder will not suffice; look to the SAIL pneumatic lock or BSAI clamp-lock series instead.
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 SAIJ63X135-50 FAQ
At an operating pressure of 0.5 MPa, this 63 mm bore cylinder generates 2182 N of push force and 1402 N of pull force. It can reach a maximum push force of 2805 N at 0.9 MPa.
A rear-mounted adjusting screw acts as a mechanical stop, allowing you to shorten the effective travel from the 135 mm nominal stroke down to a minimum of 85 mm. This stopper only sets the end position and does not lock or hold the load without continuous air pressure.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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