This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD40X70S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD40X70S 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 SUD Series Double Rod Cylinder SUD40X70S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD40X70S is a double-acting profile-type standard cylinder with a Ø40mm bore and 70mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUD40X70S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke70 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUD40X70S
About the Airtac SUD Series Double Rod Cylinder SUD40X70S
The AirTAC SUD40X70S is a double-acting, double-rod profile cylinder featuring a 40mm bore, 70mm stroke, and a 1/4 inch air port. Because a rod exits both ends on one piston, both faces use the rod-side area, making push and pull force equal at 528N, 739N, and 950N at 0.5, 0.7, and 0.9 MPa. This SUD model is discontinued; the exact drop-in replacement is the SAUD40X70S, which retains the same bore, stroke, force, port, and FA/LB mounting.
The SAUD upgrade uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches on this SUD, while the SAU family adds an SAUF built-in-valve variant. The back rod carries a sensor cam and drives two tools simultaneously, providing anti-rotation stability. Based on the 528N force at 0.5 MPa, the safe working load is about 317N, allowing a vertical lift of roughly 27kg with a 2:1 margin. A plain cylinder does not hold loads on air loss; the cushion only decelerates, so use an external rod lock for held loads.
Airtac SUD Series Double Rod Cylinder SUD40X70S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD40X70S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD40X70S |
| Bore size | Ø40 mm |
| Stroke | 70 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 SAUD40X70S 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 SAUD40X70S 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 SUD Series Double Rod Cylinder SUD40X70S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×70 | 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 SUD Series Double Rod Cylinder SUD40X70S Is Used
Dual-Tool Machining
Simultaneously drives two opposing tools from one piston, utilizing the equal both-ways force to machine parts from both ends accurately.
Anti-Rotation Transfer
Transfers workpieces along a conveyor with high anti-rotation stability, using the twin rods to prevent mechanical twisting during rapid strokes.
Compact Pinching
Pinches or grips materials in tight machinery spaces where a shorter profile barrel is required without sacrificing equal push and pull strength.
Replacing the Airtac SUD Series Double Rod Cylinder SUD40X70S with the SAUD40X70S
To replace the discontinued SUD40X70S, specify the SAUD40X70S drop-in, ensuring you swap the legacy CS1-B/DS1-B sensors for current CMSG/DMSG/EMSG switches. Size both ways by checking neighbouring bores to guarantee the equal push and pull force meets your needs. Choose a double rod when anti-rotation stability or driving two tools from one piston is required. Mounting is limited to Basic, FA, and LB (SC series compatible only). For strokes of 300mm or longer, verify the side-load limits to prevent guide wear. Remember, air cushions only decelerate; they do not hold loads without live air.
Replacement checklist
- ✓ Same bore / stroke → SAUD40X70S
- ✓ 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 SUD Series Double Rod Cylinder SUD40X70S FAQ
Yes, the SUD40X70S is discontinued. The exact drop-in replacement is the SAUD40X70S, which matches the 40mm bore, 70mm stroke, 1/4 inch port, and FA/LB mounting. You must upgrade the sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
Because it is a double-rod cylinder, force is equal both ways: 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa. The operating speed ranges from 30 to 800 mm/s, with a 21mm adjustable air cushion at each end.
Related AirTAC SAU Cylinders
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