This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X175-20, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X175-20
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X175-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 175mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X175-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke175 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X175-20
- 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 SIJ63 Double Rod Adjustable Cylinder SIJ63X175-20
The AirTAC SIJ63X175-20 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued and replaced by the SAIJ63X175-20. It features a 63mm bore, G3/8 port, and an external stop screw that lets you trim the extend stroke by up to 20mm on-site, giving a usable extension range of 155-175mm. The nominal 175mm stroke serves as the maximum. The stop screw sets the end position but is not a load lock; a plain cylinder drifts on air loss, so use an external rod lock or pilot-operated check valve for held loads.
The direct SAIJ replacement retains the exact interface, force, and porting, while upgrading to a two Y-shaped one-way piston seal for lower start-up pressure. This SKU lacks a magnet and cannot take a magnetic switch.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X175-20 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X175-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X175-20 |
| Bore size | Ø63 mm |
| Stroke | 175 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, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ63X175-20 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / 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 | |
The SAIJ63X175-20 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X175-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×175 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X175-20 Is Used
Press Fit Tuning
Allows operators to dial in the exact 155-175mm extend position for inserting bearings without machining hard stops.
Divertor Gate Adjustment
Fine-tunes the extend stroke on-site by up to 20mm to accommodate varying package sizes on a sorting line.
Pallet Stop Positioning
Provides a field-adjustable end position for pallet stops, letting crews shift the 175mm stroke by 20mm as layouts change.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X175-20 with the SAIJ63X175-20
To replace the discontinued SIJ63X175-20, order the direct replacement SAIJ63X175-20, which matches the 63mm bore, 175mm stroke, 20mm adjust window, G3/8 port, and ISO 15552 mounting. Choose the 20mm adjust window if you need precise 155-175mm extend tuning. Mounting options include FA, LB, and TC brackets. Because this SKU lacks the -S suffix, it has no magnet and cannot support legacy CS1-B/DS1-B sensors. For strokes of 300mm or longer, verify side-load limits to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X175-20
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X175-20 FAQ
Yes, the SIJ63X175-20 is discontinued. The direct replacement is the SAIJ63X175-20, which matches the 63mm bore, 175mm stroke, 20mm adjust window, G3/8 port, and ISO 15552 mounting interface.
The external stop screw offers a 20mm adjust window, allowing the 175mm extend stroke to be shortened to 155mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X175-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X175-20 replacement — usually within 7-8 hours.