This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X300-100, 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 SUJ40X300-100
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X300-100 is a double-acting profile-type standard cylinder with a Ø40mm bore and 300mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X300-100, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke300 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X300-100
- 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 SUJ40X300-100
The AirTAC SUJ40X300-100 is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 100 mm on-site, yielding a usable 200-300 mm stroke from the 300 mm nominal maximum. The direct replacement is the SAUJ40X300-100, matching the bore, stroke, force, and SC-series FA/LB mounting.
The stop screw sets the end position but is not a load lock; use an external rod lock for held loads. The SAUJ upgrade switches to current CMSG/DMSG/EMSG sensors, whereas this legacy model used CS1-B/DS1-B switches. Because this SKU lacks a magnet, it cannot take a magnetic switch.
Airtac SUJ Adjustable Cylinder SUJ40X300-100 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X300-100 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X300-100 |
| Bore size | Ø40 mm |
| Stroke | 300 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 SAUJ40X300-100 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 SAUJ40X300-100 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 SUJ40X300-100
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 SUJ40X300-100 Is Used
Custom End-Position Clamping
Adjustable stroke allows operators to dial in the exact clamping contact point on varying part widths without changing the cylinder body.
Variable-Length Ejection
Trim the extend stroke by up to 100 mm on-site to tune the ejection distance of parts moving onto downstream conveyors.
Adjustable Forming Depth
Set precise push distances for packaging flaps or forming tools where the required stroke length changes between product runs.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X300-100 with the SAUJ40X300-100
To replace this discontinued cylinder, use the SAUJ40X300-100 direct, which preserves the 40 mm bore, 300 mm stroke, 1/4" port, and FA/LB mounting. The 100 mm adjust window is ideal when exact extend endpoints must be set in the field without machining spacers. Because the stroke is 300 mm, add external guides to prevent rod bending under side loads. This non-magnet model cannot support sensing; the SAUJ with a -S suffix uses CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X300-100
- ✓ 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 SUJ40X300-100 FAQ
Yes, the SUJ40X300-100 is discontinued. The direct replacement is the SAUJ40X300-100, which matches the 40 mm bore, 300 mm stroke, 1/4" port, and FA/LB mounting. The SAUJ also 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 100 mm on-site, giving a usable 200-300 mm stroke. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X300-100
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X300-100 replacement — usually within 7-8 hours.