This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD100X250S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD100X250S 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-SUD100X250S
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X250S is a double-acting profile-type standard cylinder with a Ø100mm bore and 250mm stroke, 1/2" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD100X250S, which matches its bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke250 mm
- Port size1/2"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAUD100X250S
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X250S
The B04-SUD100X250S is an AirTAC construction-machinery dedicated double-rod profile cylinder. The B04- prefix marks it as a heavy-equipment variant of the base SUD100X250S, mechanically identical with a 100mm bore, 250mm stroke, and 1/2 inch port. As a double-acting cylinder with a rod exiting both ends, push and pull force are equal both ways at 3681N @0.5MPa, 5153N @0.7MPa, and 6626N @0.9MPa. This SUD model is discontinued and the exact drop-in replacement is the SAUD100X250S.
The SAUD upgrade retains the FA/LB mounting and compact profile barrel but uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches on this -S magnet version. Because both faces use the rod-side area, the back rod can drive a second tool simultaneously. For sizing, the safe working load is roughly 2209N (about 60% of the 3681N @0.5MPa figure), allowing a vertical lift of approximately 188kg with a 2:1 margin. Note that air cushions only decelerate near stroke end; an external rod lock is required for load holding on air loss.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X250S Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X250S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD100X250S |
| Bore size | Ø100 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | 1/2" |
| Rod thread | M20×1.5 |
| 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, 29 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The B04-SAUD100X250S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The B04-SAUD100X250S 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-SUD100X250S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 100 | 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-SUD100X250S Is Used
Excavator Actuation
Drives synchronized gripper or blade mechanisms on heavy equipment where equal push and pull force prevents uneven wear during repetitive digging cycles.
Crane Load Alignment
Uses the rear rod to mount a sensor cam for precise positioning of structural components, leveraging the compact profile to fit tight machinery bays.
Material Handler Forks
Simultaneously drives two opposing tools from one piston, ideal for clamping heavy pallets on construction sites where anti-rotation is critical.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X250S with the B04-SAUD100X250S
To replace the discontinued B04-SUD100X250S, use the drop-in SAUD100X250S, which matches the 100mm bore, 250mm stroke, 1/2 inch port, and equal-both-ways force. When sizing both ways, verify force against the 32/40/50/63/80/100mm bores, noting that 100mm yields 3681N @0.5MPa. A double rod is right when you need anti-rotation or a back rod to carry a sensor cam. Mounting uses Basic, FA, and LB only (AirTAC SC series compatible). For the -S sensor version, change legacy CS1-B/DS1-B switches to CMSG/DMSG/EMSG on the SAUD. For this 250mm stroke (under 300mm), side-load alignment is less critical than on longer strokes, but external guide rods should still support heavy loads. Never rely on the air cushion to hold a load without live air.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD100X250S
- ✓ 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-SUD100X250S FAQ
Yes, the B04-SUD100X250S is discontinued. The exact drop-in replacement is the SAUD100X250S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SUD100X250S, so all physical specs are identical. The SAUD keeps the same bore, stroke, 1/2 inch port, and FA/LB mounting, but upgrades the -S magnet sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG.
Because it is a double-rod cylinder, force is equal both ways: 3681N @0.5MPa, 5153N @0.7MPa, and 6626N @0.9MPa. The speed range is 30-800mm/s. The safe working load is roughly 2209N (60% of the 3681N @0.5MPa figure), which translates to a vertical lift of about 188kg with a 2:1 margin. It operates at 0.15-1.0MPa with a 29mm adjustable cushion at each end.
Related AirTAC SAU Cylinders
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