This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X800, 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-SID50X800
The AirTAC B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X800 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 800mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID50X800, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke800 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID50X800
- 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-SID50X800
The AirTAC B04-SID50X800 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, yielding equal force in both directions (825 N at 0.5 MPa). The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the base SID50X800, mechanically identical with a 50mm bore, 800mm stroke, M16x1.5 rod thread, and G1/4 port. This SKU has no -S magnet and cannot support sensing. The SID family is discontinued; the direct replacement is the SAID50X800, sharing the same ISO 15552 mounting interface, bore, stroke, and force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life, plus SAIL and BSAI lock variants absent in the SI line. A plain cylinder drifts on air loss; cushions only decelerate, so use an external rod lock for held loads. At 800mm stroke, external guides are critical to prevent rod bending.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X800 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X800 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X800 |
| Bore size | Ø50 mm |
| Stroke | 800 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAID50X800 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The B04-SAID50X800 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-SID50X800
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×800 | 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-SID50X800 Is Used
Excavator Linkage Actuation
Drives synchronized tooling on heavy equipment where the B04- construction-machinery prefix ensures fitment, utilizing the double-rod's equal both ways force for balanced push and pull.
Crusher Tool Adjustment
Provides rigid anti-rotation control for positioning heavy jaw or cone crusher components, leveraging the 800mm stroke to span wide operational gaps.
Dual-End Transfer Pushers
Simultaneously drives two separate material handling arms from a single piston, taking advantage of the rod exiting both ends to carry a sensor cam or secondary tool.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X800 with the B04-SAID50X800
Replace the discontinued B04-SID50X800 directly with the SAID50X800, reusing the exact ISO 15552 interface, G1/4 port, and FA, LB, or TC mounts. Size both ways using the equal push/pull force: 825 N at 0.5 MPa, or step up to a 63mm bore (1402 N) if higher force is needed. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools simultaneously. Because this SKU lacks the -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. For the 800mm stroke, incorporate external guides to manage side-load and rod-bending risks. Never rely on the air cushion for load-holding; use an external rod lock or pilot-operated check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X800
- ✓ 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-SID50X800 FAQ
Yes, the SID line is discontinued. The direct replacement is the SAID50X800. The B04- prefix simply marks this as the construction-machinery dedicated variant of SID50X800; mechanically, it is identical. The SAID50X800 shares the same 50mm bore, 800mm stroke, G1/4 port, and ISO 15552 mounting interface, but adds an upgraded two Y-shaped one-way piston seal for longer life.
Because it is a double-rod cylinder, force is equal both ways: 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at 0.9 MPa. The bore dictates a fixed G1/4 air port.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID50X800
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID50X800 replacement — usually within 7-8 hours.