This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID80X125, 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-SID80X125
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X125 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID80X125, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAID80X125
- 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-SID80X125
The B04-SID80X125 is an AirTAC construction-machinery dedicated double-rod ISO 15552 cylinder; the B04- prefix denotes the heavy-equipment variant of the base SID80X125, mechanically identical with a 125 mm stroke. A rod exits both ends on one piston, meaning both faces use the rod-side area for equal push and pull force (2268 N at 0.5 MPa). This model is discontinued and the direct replacement is the SAID80X125, retaining the G3/8 port, M20x1.5 rod thread and 36 mm cushions.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Buyers gain two non-obvious advantages: the back rod can drive a second tool simultaneously, and existing ISO 15552 mounting blocks (FA, LB, TC) reuse perfectly. Note this non-magnetic SKU cannot take switches, and air cushions only decelerate; use an external rod lock for load holding.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X125 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X125 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID80X125 |
| Bore size | Ø80 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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 standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAID80X125 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The B04-SAID80X125 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-SID80X125
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | 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-SID80X125 Is Used
Excavator Linkage Control
Uses the equal both-ways force to actuate heavy-equipment covers and doors on construction machinery, where the B04- prefix indicates dedicated deployment.
Crusher Feed Diversion
Drives a dual-sided diverter arm on aggregate conveyors, utilizing the second rod end to mount a mechanical sync linkage without extra brackets.
Concrete Mold Ejection
Provides balanced push and pull ejection force on precast concrete forms, preventing binding in high-dust environments using adjustable 36 mm cushions.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID80X125 with the B04-SAID80X125
Replace the discontinued B04-SID80X125 directly with the SAID80X125, matching the 80 mm bore, 125 mm stroke, G3/8 port and equal both-ways force. Size both directions by checking neighbouring bores (63 mm or 100 mm) against your push and pull requirements, remembering the double-rod design outputs equal force each way. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools from one piston. Reuse FA, LB or TC mounts; select the -S magnet option if you need sensor tracking. For strokes at or above 300 mm, verify side-load limits to prevent guide bush wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID80X125
- ✓ 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-SID80X125 FAQ
Yes, the B04-SID80X125 (construction-machinery dedicated SID80X125) is discontinued. The direct replacement is the SAID80X125, offering the same ISO 15552 interface, 80 mm bore, 125 mm stroke, G3/8 port and mounting. The SAI family also adds upgraded seals and SAIL/BSAI lock variants.
The double-acting double-rod design yields equal force both ways: 2268 N at 0.5 MPa, 3175 N at 0.7 MPa, and 4082 N at 0.9 MPa. It features a G3/8 air port, M20x1.5 rod thread, 36 mm cushions, and operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID80X125
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID80X125 replacement — usually within 7-8 hours.