This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ63X40-20, with the same bore, stroke, output force, port and mounting, so it fits the same application. 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 SUJ63X40-20
The AirTAC Airtac SUJ Adjustable Cylinder SUJ63X40-20 is a double-acting profile-type standard cylinder with a Ø63mm bore and 40mm stroke, 3/8" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ63X40-20, which matches its bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke40 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ63X40-20
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SUJ Adjustable Cylinder SUJ63X40-20
The AirTAC SUJ63X40-20 is a double-acting double-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 20-40 mm extend window from the 40 mm nominal maximum. It features a 3/8" port, an M16x1.5 rod thread, and 21 mm adjustable cushions. This SKU lacks a magnet and cannot accept a sensing switch.
This discontinued SUJ series is replaced by the direct replacement SAUJ63X40-20, retaining the exact bore, stroke, force, port, and SC-series FA/LB mounting compatibility. The compact profile barrel is shorter than an ISO 15552 cylinder of the same bore. The SAUJ upgrade transitions to current CMSG/DMSG/EMSG sensors, leaving behind the legacy CS1-B/DS1-B switches. Note that the stop screw sets end position only; it is not a load lock, and a plain cylinder drifts on air loss, requiring an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ63X40-20 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ63X40-20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ63X40-20 |
| Bore size | Ø63 mm |
| Stroke | 40 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 SAUJ63X40-20 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 SAUJ63X40-20 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SUJ Adjustable Cylinder SUJ63X40-20
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×40 | 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 SUJ63X40-20 Is Used
Variable Pitch Indexing
Ideal for pushing parts to a stop where the exact extend distance requires field tuning up to 20 mm to accommodate different material lengths without changing the cylinder body.
Adjustable Transfer Diverter
Perfect for diverting packages on a line when the divert stroke needs precise on-site adjustment to handle varying product widths without re-plumbing the pneumatic system.
Custom End-Stop Positioning
Used in compact assembly cells where the 63 mm bore force and a field-tuned 20-40 mm stroke window allow operators to dial in the exact contact point for delicate operations.
Replacing the Airtac SUJ Adjustable Cylinder SUJ63X40-20 with the SAUJ63X40-20
To replace the discontinued SUJ63X40-20, order the direct replacement SAUJ63X40-20, which preserves the 3/8" port, M16x1.5 rod, and FA/LB mounting. The 20 mm adjust window is ideal when exact end positioning varies by up to 20 mm on-site. Because this specific SKU has no magnet, you cannot mount switches; if sensing is needed, select an SAUJ with the -S option and use CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B. Since the 40 mm stroke is under 300 mm, side-load bending moments are minimal, but always guide the rod externally. The stop screw merely sets the end position and does not hold loads; use an external rod lock for pneumatic load holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ63X40-20
- ✓ 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 SUJ63X40-20 FAQ
Yes, the SUJ63X40-20 is discontinued. The direct replacement is the SAUJ63X40-20, which matches the 63 mm bore, 40 mm stroke, 3/8" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw allows you to trim the extend stroke by up to 20 mm on-site, giving a usable extend range of 20-40 mm. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ63X40-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ63X40-20 replacement — usually within 7-8 hours.