This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X160S, 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-SID50X160S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X160S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 160mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID50X160S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke160 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID50X160S
- 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-SID50X160S
The B04-SID50X160S is an ISO 15552 double-rod, double-acting cylinder where the B04- prefix marks it as AirTAC's construction-machinery dedicated variant, mechanically identical to the base SID50X160S. A rod exits both ends on one piston, meaning both faces use the rod-side area and push/pull force is equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. It features a 50mm bore, G1/4 port, M16x1.5 rod thread, and 30mm adjustable cushions. This SID model is discontinued; the direct replacement is the SAID50X160S, which reuses the same ISO 15552 mounting interface, bore, stroke, and port.
The SAI upgrade uses an upgraded two Y-shaped one-way piston seal for low start-up pressure and long life. Beyond the double-rod anti-rotation benefit, the back rod can carry a sensor cam to drive two tools simultaneously. Note that a plain cylinder does not hold loads on air loss; the cushion only decelerates. For held loads, use an external rod lock or SAIL/BSAI variant.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X160S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X160S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X160S |
| Bore size | Ø50 mm |
| Stroke | 160 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-SAID50X160S 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-SAID50X160S 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-SID50X160S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×160 | 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-SID50X160S Is Used
Excavator Linkage
Equal both-ways force drives construction-machinery covers without rotational drift.
Heavy Equipment Transfer
Back rod carries a sensor cam to track stroke on dual-tool material handling.
Builder Machine Clamp
Anti-rotation stability clamps components securely in heavy-equipment assembly.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X160S with the B04-SAID50X160S
To replace the discontinued B04-SID50X160S, specify the SAID50X160S (insert A after S); it is a direct swap retaining the 50mm bore, 160mm stroke, G1/4 port, and ISO 15552 mounting. Size both ways by checking neighbor bores (32/40/63) to ensure the equal-both-ways force fits your application. A double rod is right when you need anti-rotation or a back rod for a sensor cam. Reuse FA, LB, or TC mounts. The -S suffix means a piston magnet is present for CS1-B/DS1-B switches (SAI uses current switches). For stroke >=300, verify side-load limits.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X160S
- ✓ 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-SID50X160S FAQ
Yes, it is discontinued. The B04- prefix marks it as the construction-machinery dedicated variant of SID50X160S. The direct replacement is the SAID50X160S, sharing the same ISO 15552 interface, bore, stroke, and G1/4 port.
Force is equal both ways: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. The bore is 50mm, the air port is G1/4, the rod thread is M16x1.5, and speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID50X160S
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID50X160S replacement — usually within 7-8 hours.