Airtac BSAI Locking Clamp Cylinder BSAI100X350
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI100X350 is a genuine double-acting ISO 15552 cylinder with a Ø100mm 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 5500 N.
- BoreØ100 mm
- Stroke350 mm
- Cylinder portG1/2
- 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 BSAI100X350
The AirTAC BSAI100X350 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released clamp-lock mechanism. It provides a static holding force of 5500 N, gripping the piston rod securely at any position along its 350 mm travel. This bidirectional enclasp function ensures the load remains fixed whether the rod was extending or retracting. Delivering a practical push thrust of 5497 N at 0.7 MPa, it is crucial to distinguish this from the holding capacity: you must size the 5500 N clamp force against your static load, not the cylinder thrust.
The clamp operates via a third G1/8 enclasp port, separate from the 1/2 inch cylinder ports, requiring 0.15-0.7 MPa to release. The integrated variable air cushion only decelerates the piston near stroke ends; the clamp itself is what holds the load. Note that the lock engages only after the rod has completely stopped, as it cannot brake a moving piston. Furthermore, unlocking requires balanced air pressures on both sides of the piston to prevent the rod from jumping abruptly.
Airtac BSAI Locking Clamp Cylinder BSAI100X350 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI100X350 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø100 mm |
| Stroke | 350 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G1/2 |
| Rod thread | M20×1.5 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 5500 N |
| Enclasp / unlock port | G1/8 |
| Operating pressure | 0.15 – 0.7 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 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 (Ø100 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa (max) | 5498 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (5500 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI100X350 Is Used
Vertical Axis Load Holding
Maintains vertical loads securely at any point in the 350 mm travel, preventing gravity-driven drops during air pressure loss.
Machining Position Lock
Freezes the 25 mm rod mid-stroke to hold a workpiece firmly for machining or inspection without relying on cylinder thrust.
Power Loss Safety Hold
The spring-applied clamp engages automatically upon air loss, locking the load exactly where it stopped to protect operators.
Is the Airtac BSAI Locking Clamp Cylinder BSAI100X350 the Right Clamp-Lock?
Choose this 100 mm bore model when substantial thrust and holding power are required. If your load is lighter, stepping down to the 80 mm bore offers 3518 N thrust at 0.7 MPa and a 3600 N holding force. Step up to the 125 mm bore for 8590 N thrust and 8600 N holding force. Select the BSAI clamp-lock over a standard SAI cylinder when you need to hold a position mid-stroke without maintaining live air pressure. A SAIL cylinder only locks at stroke ends, whereas this BSAI locks anywhere. A plain SAI suffices if no position holding is needed.
As a replacement match, verify the single-rod configuration, 100 mm bore, 350 mm stroke, PT port threads, and the correct mounting set (Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, TCM2). The M20x1.5 rod thread offers robust side-load capacity, but at 350 mm stroke, an external guide is recommended for unsupported loads. This unit lacks a magnet; order an -S variant if CMSE reed or DMSE electronic sensors are needed. Remember that safety-critical loads require an additional independent safety measure beyond the clamp.
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 BSAI100X350 FAQ
The clamp-lock provides a static holding force of 5500 N. It grips the rod bidirectionally at any position along the stroke, but it only engages after the cylinder has stopped moving and cannot act as a brake.
The clamp is released via the G1/8 enclasp port, but you must first balance the air pressures on both sides of the piston. If pressures are not balanced when unlocking, the rod can move abruptly, presenting a real hazard.
Related AirTAC Lock & Standard Cylinders
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