Airtac BSAI Locking Clamp Cylinder BSAI50X500
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI50X500 is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 500mm 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 1400 N.
- BoreØ50 mm
- Stroke500 mm
- Cylinder portG1/4
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM16×1.5
- 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 BSAI50X500
The AirTAC BSAI50X500 is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock. It delivers 982N of thrust at 0.5MPa and secures the 20mm carbon steel rod at any position along its 500mm travel. A defining trait of this enclasp mechanism is its 1400N static holding force. Buyers must distinguish this holding force from thrust: the 1400N rating dictates the static load capacity, while the 982N thrust drives the motion. Do not size the lock based on the cylinder's push force.
This bidirectional clamp engages only after the rod stops, meaning it cannot brake a moving load. Unlocking requires balanced air pressure across the piston via the G1/8 enclasp port, preventing abrupt rod jumps. Remember that the variable air cushion only decelerates the piston near stroke ends; the clamp itself is what holds the load securely.
Airtac BSAI Locking Clamp Cylinder BSAI50X500 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI50X500 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 500 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G1/4 |
| Rod thread | M16×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 1400 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 (Ø50 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa (max) | 1374 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (1400 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI50X500 Is Used
Vertical Axis Holding
Locks a 1400N load securely at any mid-stroke position on vertical lifts, preventing gravity-driven drops during operation.
Power Loss Safety
Spring-applied clamp engages automatically upon air loss, holding the 20mm rod exactly where it stopped to protect operators.
Machining Position Hold
Secures the workpiece at a precise intermediate point for processing, functioning independently of the end-of-stroke cushions.
Is the Airtac BSAI Locking Clamp Cylinder BSAI50X500 the Right Clamp-Lock?
Select this 50mm bore when a 40mm bore (528N pull thrust, 900N hold) lacks sufficient clamping capacity, but a 63mm bore (1402N pull thrust, 2200N hold) is oversized. The BSAI50X500 is chosen over a SAIL model when the load must be gripped mid-stroke rather than solely at the end. If position holding is unnecessary, a plain SAI cylinder suffices. For this 500mm stroke, add an external guide to support the rod against side loads. Replacement requires a single-rod, 50mm x 500mm unit with PT ports, and the Basic/FA/FB/CA/CB/CR/LB/TC/TCM1/TCM2 mounting set.
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 BSAI50X500 FAQ
The integrated clamp-lock provides a static holding force of 1400N. It can secure the rod at any position along the 500mm stroke, but only after the cylinder has completely stopped moving.
The lock is released by supplying 0.15-0.7 MPa to the G1/8 enclasp port, but only after the air pressures on both sides of the piston are balanced. If pressures are unbalanced, the rod may jump abruptly upon release.
Related AirTAC Lock & Standard Cylinders
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