This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD40X700 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD40X700 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-SUD40X700
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X700 is a double-acting profile-type standard cylinder with a Ø40mm bore and 700mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD40X700, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke700 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAUD40X700
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X700
The AirTAC B04-SUD40X700 is a double-acting, double-rod profile cylinder where the rod exits both ends, generating equal force in both directions (528N at 0.5MPa). The B04- prefix marks this as a construction-machinery dedicated variant of the SUD40X700, mechanically identical to the base model. It features an extruded aluminum profile barrel, a 16mm rod, and a 1/4 inch port. This discontinued model is replaced by the SAUD40X700.
Because two rods share the piston area, push and pull forces are identical, preventing rod deflection and allowing a back rod to drive a second tool. The safe working load is roughly 317N, offering a vertical lift capacity of about 27kg with a 2:1 margin. Note this non-magnetic SKU cannot take switches, and the air cushion only decelerates; it does not hold loads without live air.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X700 Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X700 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD40X700 |
| Bore size | Ø40 mm |
| Stroke | 700 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| 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 1200 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The B04-SAUD40X700 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The B04-SAUD40X700 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-SUD40X700
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×700 | 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-SUD40X700 Is Used
Excavator Panel Pusher
Drives heavy-equipment cabin panels on an excavator assembly line, utilizing the equal both-ways force to push and retract without deflection across the 700mm stroke.
Loader Arm Indexer
Indexes loader arm components during fabrication, where the dual-rod design prevents rotation and maintains precise alignment for heavy-machinery welding fixtures.
Crane Component Conveyor
Synchronizes material handling for crane sub-assemblies by driving two conveyor stops simultaneously from opposite ends using the single piston.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X700 with the B04-SAUD40X700
To replace this discontinued cylinder, use the SAUD40X700, which matches the 40mm bore, 700mm stroke, 1/4 inch port, and FA/LB mounting. When sizing both ways, verify the equal push/pull force fits your load, stepping to a 50mm bore if higher force is needed. A double rod is right when you need anti-rotation or dual-tool driving. For this 700mm stroke, use external guides to prevent rod bending under side loads. As a non-magnetic SKU, it cannot accept sensors, but upgrading to an SAUD with the -S suffix changes the sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG. For load holding, add an external rod lock, as cushions only decelerate.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD40X700
- ✓ 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-SUD40X700 FAQ
Yes, this construction-machinery dedicated variant of the SUD40X700 is discontinued. The exact drop-in replacement is the SAUD40X700, which preserves the 40mm bore, 700mm stroke, equal both-ways force, and 1/4 inch port. The B04- prefix only designates the industry application and changes no physical specs.
The bore is 40mm with a 1/4 inch port. Because it is a double-rod cylinder, force is equal both ways: 528N at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa. The safe working load is approximately 317N, yielding a 27kg vertical lift capacity with a 2:1 margin.
Related AirTAC SAU Cylinders
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