Airtac BSAI Locking Clamp Cylinder BSAI63X350
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI63X350 is a genuine double-acting ISO 15552 cylinder with a Ø63mm bore, 350mm 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 2200 N.
- BoreØ63 mm
- Stroke350 mm
- Cylinder portG3/8
- 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 BSAI63X350
The AirTAC BSAI63X350 is a double-acting ISO 15552 profile cylinder featuring an integrated spring-applied, air-released clamp-lock. It provides a robust static holding force of 2200 N, gripping the 20 mm carbon steel rod securely at any position along its 350 mm travel. The base cylinder generates 1559 N of thrust at 0.5 MPa, reaching a practical maximum of 2182 N at 0.7 MPa. Remember that holding force and thrust are separate quantities; you must size the 2200 N clamp capacity against your static load, not the cylinder thrust.
This enclasp mechanism is bidirectional, maintaining the load whether the rod was extending or retracting. It engages only after the piston has come to a complete stop, meaning it cannot brake a moving rod. To disengage the lock, air must be supplied to the dedicated G1/8 enclasp port, requiring balanced pressures on both sides of the piston to prevent the rod from jumping abruptly upon release. Furthermore, the variable air cushions at the stroke ends only decelerate the piston; they do not hold the load.
Airtac BSAI Locking Clamp Cylinder BSAI63X350 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI63X350 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø63 mm |
| Stroke | 350 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G3/8 |
| Rod thread | M16×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 2200 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 (Ø63 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa (max) | 2182 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (2200 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI63X350 Is Used
Vertical Axis Holding
Prevents gravity-induced drops on vertical strokes by locking the rod anywhere mid-travel with 2200 N of holding force during power loss.
Machining Position Hold
Secures the workpiece at a precise intermediate point for machining or inspection without relying on live air pressure.
Emergency Mid-Stroke Lock
Acts as a fail-safe gripper that engages instantly once the piston stops, holding the load securely until balanced pressure unlocks it.
Is the Airtac BSAI Locking Clamp Cylinder BSAI63X350 the Right Clamp-Lock?
Step down to a 50 mm bore if your application only requires 982 N of thrust at 0.5 MPa and a 1400 N holding capacity, or step up to an 80 mm bore for 2513 N thrust and 3600 N of clamp force. Choose this BSAI model over a SAIL cylinder when you need to lock at any intermediate position rather than just at the stroke ends. If position holding is not required at all, a plain SAI cylinder suffices. For safety-critical loads, an additional independent safety measure is required, as the clamp locks only after the cylinder stops.
This specific configuration features a single carbon steel rod with an M16x1.5 thread, PT tapered port threads (3/8 cylinder port, G1/8 enclasp port), and no magnet. It supports BSAI mountings including Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2. Because the stroke is 350 mm, the 20 mm rod diameter provides a sturdy foundation, but an external guide is recommended to manage side loads over this extended travel.
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 BSAI63X350 FAQ
The integrated clamp-lock provides a static holding force of 2200 N. It is spring-applied and air-released, gripping the rod at any position along the stroke to hold the load securely without live pressure.
The lock is released by supplying air to the G1/8 enclasp port, but only after the air pressures on both sides of the piston are balanced. If pressures are not balanced, the rod can move abruptly upon release, so ensure the cylinder has stopped completely before unlocking.
Related AirTAC Lock & Standard Cylinders
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