This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X125S, 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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X125S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X125S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID63X125S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID63X125S
- 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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X125S
The B04-SID63X125S is AirTAC's construction-machinery dedicated variant of the ISO 15552 double-rod cylinder. The B04- prefix marks it for heavy-equipment builders but changes no physical spec; it delivers equal force both ways (1402 N @0.5 MPa) via a 20 mm rod exiting both ends on a 63 mm bore. This SKU is discontinued; the direct replacement is the SAID63X125S, reusing the same G3/8 port, M16x1.5 thread, and 30 mm adjustable cushions.
Because the piston has two rods, the effective area is identical in both directions, preventing single-rod push/pull imbalance. The SAI upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note that air cushions only decelerate; for load-holding on air loss, use an external rod lock or SAIL/BSAI variant.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X125S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X125S |
| Bore size | Ø63 mm |
| Stroke | 125 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 B04-SAID63X125S 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 B04-SAID63X125S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X125S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×125 | 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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X125S Is Used
Excavator Valve Actuation
Equal both-ways force ensures precise, balanced shifting of heavy hydraulic pilot valves on construction machinery.
Crusher Feed Sync
Drives two opposing material guides simultaneously from one piston, keeping rock feed aligned in heavy equipment.
Drill Rig Guide Lock
The second rod acts as a stable sensor cam track for position feedback on rigid drill rig mast positioning.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X125S with the B04-SAID63X125S
To replace the discontinued B04-SID63X125S, specify the SAID63X125S, which is a direct match for the ISO 15552 mounting interface (Basic, FA, LB, TC) and 125 mm stroke. Size both ways by confirming the 1402 N @0.5 MPa equal force is sufficient; if more force is needed, step up to the 80 mm bore (2268 N @0.5), or drop to the 50 mm bore (825 N @0.5) if lower. A double-rod design is right when you need anti-rotation stability or want to drive two tools from one piston. The -S suffix means a piston magnet is present for CS1-B/DS1-B switches. For strokes >=300 mm, verify side-load limits to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X125S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X125S FAQ
Yes, the B04-SID63X125S (AirTAC's construction-machinery dedicated variant of SID63X125S) is discontinued. The direct replacement is the SAID63X125S, which matches the ISO 15552 interface, 63 mm bore, 125 mm stroke, G3/8 port, and mounting. The B04- prefix is an industry designation only and does not change physical specs.
As a double-acting double-rod cylinder, force is equal both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The bore is 63 mm with a G3/8 air port, a 20 mm rod, M16x1.5 rod thread, and 30 mm adjustable cushions. The cylinder does not hold loads on air loss; use an external rod lock for holding.
Related AirTAC SAI Cylinders
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