This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUJ63X400-20S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUJ63X400-20S 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 SUJ Adjustable Cylinder SUJ63X400-20S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ63X400-20S is a double-acting profile-type standard cylinder with a Ø63mm bore and 400mm stroke, 3/8" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUJ63X400-20S, which matches its bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke400 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ63X400-20S
About the Airtac SUJ Adjustable Cylinder SUJ63X400-20S
The AirTAC SUJ63X400-20S is a double-acting single-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 380-400 mm stroke. The nominal 400 mm represents the maximum extension. Because it is discontinued, the exact drop-in replacement is the SAUJ63X400-20S, which retains the 63 mm bore, 3/8" port, M16x1.5 rod thread, and 21 mm adjustable air cushions.
This bore delivers 1559 N push and 1402 N pull at 0.5 MPa, climbing to 2805 N at 0.9 MPa. A computed buyer insight: the 0.5 MPa push yields a safe working load of roughly 935 N, or a vertical lift capacity of about 79 kg with a 2:1 margin. The SAUJ upgrade transitions the -S magnet from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors while keeping SC-series FA/LB mounting compatibility.
Airtac SUJ Adjustable Cylinder SUJ63X400-20S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ63X400-20S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ63X400-20S |
| Bore size | Ø63 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | 3/8" |
| Rod thread | M16×1.5 |
| 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, 21 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUJ63X400-20S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAUJ63X400-20S 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 SUJ Adjustable Cylinder SUJ63X400-20S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×400 | 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 SUJ Adjustable Cylinder SUJ63X400-20S Is Used
Variable-Length Ejector Stroke
Tuning the ejection distance on a 63 mm bore assembly line by up to 20 mm on-site allows operators to adapt to varying product widths without changing the entire actuator.
Adjustable Transfer Pusher
A 400 mm transfer pusher that handles mixed parcel sizes uses the external stop screw to shorten the extend stroke precisely, preventing parcel damage at the end of travel.
Variable-Depth Pallet Stops
Positioning stops on a pallet handling line can be field-adjusted within the 380-400 mm range to accommodate different pallet depths while utilizing the 1559 N push force at 0.5 MPa.
Replacing the Airtac SUJ Adjustable Cylinder SUJ63X400-20S with the SAUJ63X400-20S
To replace the discontinued SUJ63X400-20S, specify the SAUJ63X400-20S drop-in: it matches the 63 mm bore, 400 mm max stroke, 20 mm adjust window, 3/8" port, and FA/LB mounting. When sizing both ways, the neighbouring 50 mm bore provides 1374 N push at 0.7 MPa, while the 80 mm bore offers 3518 N push at 0.7 MPa. Choose the 20 mm adjust window if you need precise end-position tuning without swapping cylinders. For the -S magnet, the SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B. At a 400 mm stroke, prevent rod bending by supporting the load with external guides to minimize side-load stress. The stop screw sets end position but is not a load lock; use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ63X400-20S
- ✓ 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 SUJ Adjustable Cylinder SUJ63X400-20S FAQ
Yes, the SUJ63X400-20S is discontinued. The exact drop-in replacement is the SAUJ63X400-20S, which matches the 63 mm bore, 400 mm stroke, 20 mm adjust window, 3/8" port, and FA/LB mounting. The SAUJ also offers the SAUF built-in-valve variant the SU line lacked.
The double-acting single-rod 63 mm bore provides 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and 2805 N push at 0.9 MPa. The external stop screw window is 20 mm, allowing you to trim the 400 mm extend stroke down to 380 mm on-site. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
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