This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD32X250 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD32X250 in place of this model. The SAU replacement uses the same profile body, bore, stroke, force and SC-series mounting. It moves to the current CMSG / DMSG / EMSG sensor switches (the SU used CS1-B / DS1-B) and adds the SAUF valve-integrated option.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X250
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X250 is a double-acting profile-type standard cylinder with a Ø32mm bore and 250mm stroke, 1/8" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD32X250, which matches its bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke250 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → B04-SAUD32X250
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X250
The B04-SUD32X250 is a double-acting, double-rod profile cylinder where the B04- prefix designates it as the construction-machinery dedicated variant of the SUD32X250, mechanically identical to the base model. A rod exits both ends of the extruded aluminum barrel on a single piston, meaning push and pull force are equal both ways at 345 N @0.5 MPa, 483 N @0.7 MPa, and 621 N @0.9 MPa. It features a 32 mm bore, 250 mm stroke, 1/8" port, M10x1.25 rod thread, and 21 mm adjustable cushions. This legacy SKU has no magnet and cannot accept a sensor.
This discontinued model is fully replaced by the SAUD32X250 drop-in replacement, which retains the exact bore, stroke, equal force, port, and FA/LB mounting. The double-rod design prevents piston rotation and allows the back rod to drive a second tool simultaneously. For sizing, the 345 N @0.5 MPa force yields a safe working load of roughly 207 N (60%) and a vertical lift capacity of about 18 kg with a 2:1 margin. Note that air cushions only decelerate the piston near stroke end; an external rod lock is required to hold loads on air loss.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X250 Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X250 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD32X250 |
| Bore size | Ø32 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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, 21 mm |
| Max standard stroke | Up to 1000 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The B04-SAUD32X250 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
The B04-SAUD32X250 produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X250
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SU-family variants: SUD (double rod), SUJ (adjustable stroke) — each maps to its SAU equivalent (SUD→SAUD, SUJ→SAUJ). The current SAU line adds the SAUF valve-integrated option.
Where the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X250 Is Used
Excavator Panel Indexing
Uses the equal both-ways force to push and pull heavy cab panels on construction machinery without stroke deviation.
Dual-Tool Actuation
The rear rod drives a secondary clamp on a heavy-equipment assembly line while the front rod performs the main press.
Anti-Rotation Gate Control
Prevents rod twist during horizontal material gate cycling on construction sites where consistent alignment is critical.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X250 with the B04-SAUD32X250
To replace the B04-SUD32X250, drop in the SAUD32X250—it matches the 32 mm bore, 250 mm stroke, 1/8" port, and FA/LB mounting exactly. Because force is equal both ways, size it by checking neighboring bores against your bidirectional load; the 345 N @0.5 MPa output gives a 207 N safe load. Choose a double-rod cylinder when you need anti-rotation or to drive two tools from one piston. For the 250 mm stroke, ensure your side-load guide is aligned to prevent binding. This non-magnetic SKU cannot take sensors, but the SAUD upgrade supports current CMSG/DMSG/EMSG sensors (replacing legacy CS1-B/DS1-B).
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD32X250
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S): sensor family CS1-B → CMSG
- ✓ Mounting reused (FA/FB/CA/CB/LB)
- ✓ Need a built-in valve? → SAUF
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X250 FAQ
Yes, this construction-machinery dedicated variant is discontinued. The exact drop-in replacement is the SAUD32X250, which matches the 32 mm bore, 250 mm stroke, 1/8" port, and FA/LB mounting. The B04- prefix simply denotes the construction-machinery application and changes no physical specs.
Force is equal both ways at 345 N @0.5 MPa, 483 N @0.7 MPa, and 621 N @0.9 MPa. The air port is 1/8". The safe working load is approximately 207 N (60% of the 0.5 MPa figure), yielding an 18 kg vertical lift capacity with a 2:1 margin.
Related AirTAC SAU Cylinders
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