This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD32X125 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD32X125 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-SUD32X125
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X125 is a double-acting profile-type standard cylinder with a Ø32mm bore and 125mm stroke, 1/8" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD32X125, which matches its bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → B04-SAUD32X125
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X125
The AirTAC B04-SUD32X125 is a double-acting, double-rod profile cylinder where the B04- prefix marks it as the construction-machinery dedicated variant of the base SUD32X125, mechanically identical to it. A rod exits both ends on one piston, meaning both faces use the rod-side area and 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. The extruded aluminium profile barrel is shorter than an ISO 15552 cylinder of the same bore. This discontinued model features a 12 mm rod, M10x1.25 rod-end thread, and a 1/8 inch port.
As a drop-in replacement, the SAUD32X125 retains the exact bore, stroke, force, port, and SC-series FA/LB mounting. The SAUD uses current CMSG/DMSG/EMSG sensors, whereas this SUD used legacy CS1-B/DS1-B switches. This specific SKU has no magnet (no -S) and cannot take a magnetic switch. A plain cylinder does not hold its load on air loss; the air cushion only decelerates near stroke end, so use an external rod lock for held loads. For sizing, the safe working load is ~207 N (about 60% of the 345 N @0.5 MPa figure) and vertical lift is ~18 kg with a 2:1 margin.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X125 Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X125 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD32X125 |
| Bore size | Ø32 mm |
| Stroke | 125 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-SAUD32X125 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-SAUD32X125 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-SUD32X125
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×125 | 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-SUD32X125 Is Used
Excavator Linkage Actuation
Drives synchronized opposing tools on heavy-equipment attachments where the B04- construction-machinery prefix ensures application fit and equal both-ways force handles balanced push and pull.
Sliding Gate Mechanism
Moves heavy machinery access gates using the back rod to carry a sensor cam, leveraging the compact profile barrel to fit tight structural frames without tie-rod interference.
Dual-Tool Synchronized Pusher
Pushes and pulls two separate workpieces simultaneously from a central pivot, using the equal both-ways force and 345 N @0.5 MPa output to ensure matched motion across the stroke.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD32X125 with the B04-SAUD32X125
To replace the B04-SUD32X125, drop in the SAUD32X125, which matches the 32 mm bore, 125 mm stroke, 1/8 inch port, and FA/LB mounting exactly. Because force is equal both ways, size both directions by checking neighbouring bores against your push and pull requirements. A double rod is right when you need anti-rotation, a back rod to carry a sensor cam, or to drive two tools. If upgrading to the SAUD, note the -S sensor change from CS1-B/DS1-B to CMSG/DMSG/EMSG. For this 125 mm stroke, side-load is minimal, but for any stroke >=300 mm, maintain a side-load line to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD32X125
- ✓ 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-SUD32X125 FAQ
Yes, the B04-SUD32X125 is discontinued. The exact drop-in replacement is the SAUD32X125. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SUD32X125, mechanically identical in bore, stroke, force, and 1/8 inch port. The SAUD keeps the same FA/LB mounting but uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
Because it is a double-rod cylinder, force is equal both ways and never quotes a larger single-rod push value. It delivers 345 N @0.5 MPa, 483 N @0.7 MPa, and 621 N @0.9 MPa. The bore is 32 mm, the port is 1/8 inch, the rod is 12 mm with an M10x1.25 thread, and speed is 30-800 mm/s. The safe working load is ~207 N.
Related AirTAC SAU Cylinders
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