Airtac BSAI Locking Clamp Cylinder BSAI80X300S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI80X300S is a genuine double-acting ISO 15552 cylinder with a Ø80mm bore, 300mm stroke and a spring-applied, air-released clamp-lock that holds the rod at ANY position along its travel — with a static holding force of 3600 N.
- BoreØ80 mm
- Stroke300 mm
- Cylinder portG3/8
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM20×1.5
- 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 BSAI Locking Clamp Cylinder BSAI80X300S
The AirTAC BSAI80X300-S is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock. It provides a static holding force of 3600 N, gripping the 25 mm carbon steel rod to secure loads at any position along the 300 mm stroke. Do not confuse this holding force with the cylinder thrust; the 3600 N clamp rating is the static load capacity, which is entirely separate from the 2513 N push thrust generated at 0.5 MPa.
This unit includes a magnet (-S) for position sensing with CMSE reed or DMSE electronic switches. The lock engages only after the piston stops, serving as a hold device rather than a braking mechanism. A third G1/8 enclasp port supplies 0.15-0.7 MPa to release the lock, which requires balanced cylinder pressures to prevent the rod from jumping abruptly upon release.
Airtac BSAI Locking Clamp Cylinder BSAI80X300S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI80X300S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 300 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G3/8 |
| Rod thread | M20×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 3600 N |
| Enclasp / unlock port | G1/8 |
| Operating pressure | 0.15 – 0.7 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Max stroke | Up to 1000 mm |
Specifications follow the official AirTAC BSAI datasheet (ISO 15552). Operating pressure is 0.15–0.7 MPa (lower than a plain SAI). Port options: PT / G.
How the Clamp-Lock Holds
static holding force (Ø80 mm)
A spring-applied gripper clamps the rod and holds the load at any position in the stroke — not just at the stroke end (that is a SAIL) — and it is bidirectional: it holds whether the rod was extending or retracting.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa (max) | 3519 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (3600 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI80X300S Is Used
Vertical Axis Hold
Secures a lifted platen at any point in the 300 mm travel, preventing falls during a power loss event.
Machining Position Lock
Clamps a workpiece carriage mid-stroke for stable milling or drilling operations without relying on air pressure.
Emergency Safety Stop
Holds the load securely once motion ceases, providing a reliable static brake for fail-safe machine protection.
Is the Airtac BSAI Locking Clamp Cylinder BSAI80X300S the Right Clamp-Lock?
Choose this 80 mm bore when a 63 mm bore (1402 N pull thrust, 2200 N hold) lacks the required load capacity, or step down to a 50 mm bore (825 N pull thrust, 1400 N hold) for lighter duties. Select this BSAI model over a SAIL cylinder when you need the load held mid-stroke rather than only at the end. If no intermediate holding is required, a plain SAI cylinder suffices. For safety-critical stops, add an independent safety measure, as this clamp cannot brake a moving rod.
Replacement matching requires a single rod, 80 mm bore, 300 mm stroke, and 3/8 PT port threads. The 300 mm stroke necessitates an external guide to manage side loads. It accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. The M20x1.5 rod thread offers high side-load resistance.
Quick checklist
- ✓ Hold needed at any position?
- ✓ Or stroke-end only → use SAIL
- ✓ Holding force ≥ your load
- ✓ Balanced-pressure unlock circuit
- ✓ Extra safety measure for people
Airtac BSAI Locking Clamp Cylinder BSAI80X300S FAQ
The clamp-lock provides a static holding force of 3600 N. It grips the rod bidirectionally at any position, but only engages after the cylinder has completely stopped moving.
The lock is released by supplying air to the G1/8 enclasp port. To prevent the rod from jumping, the air pressures on both sides of the piston must be balanced before unlocking.
Related AirTAC Lock & Standard Cylinders
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