Airtac BSAI Locking Clamp Cylinder BSAI100X125S
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI100X125S is a genuine double-acting ISO 15552 cylinder with a Ø100mm bore, 125mm 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
- Stroke125 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 BSAI100X125S
The AirTAC BSAI100X125-S is a double-acting ISO 15552 profile cylinder featuring a single carbon steel rod and a built-in spring-applied, air-released clamp-lock. It delivers 3927 N of thrust at 0.5 MPa and utilizes a PT tapered 1/2 inch cylinder port alongside a dedicated G1/8 enclasp port. The integrated clamping mechanism provides a robust 5500 N static holding force, gripping the rod securely at any position along its 125 mm travel. Equipped with a standard magnet (-S), it supports precise position sensing via CMSE reed or DMSE electronic solid-state switches.
A critical distinction exists between the 5500 N holding force and the cylinder thrust; the clamp secures the static load, whereas thrust dictates motion, so always size the holding capacity against the load weight. Furthermore, the variable air cushion at the stroke ends solely decelerates the piston to prevent impact damage and must never be confused with the lock itself. The clamp engages strictly after the cylinder has stopped moving and cannot function as a dynamic brake. Unlocking requires balanced air pressure on both piston sides, or the rod may abruptly jump, meaning safety-critical applications must include an independent external measure.
Airtac BSAI Locking Clamp Cylinder BSAI100X125S Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI100X125S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø100 mm |
| Stroke | 125 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 – 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 (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 BSAI100X125S Is Used
Vertical Axis Load Holding
Secure heavy vertical workpieces at any point in the stroke, preventing gravity-driven drops during cycle pauses.
Power Loss Safety Lock
Maintain position instantly upon air pressure loss, holding the load safely mid-stroke until system pressure is restored.
Machining Position Hold
Lock the rod rigidly during drilling or milling operations to eliminate vibration and ensure dimensional accuracy.
Is the Airtac BSAI Locking Clamp Cylinder BSAI100X125S the Right Clamp-Lock?
Step down to a 80 mm bore if your application requires less thrust (2513 N push at 0.5 MPa) and a 3600 N holding force is sufficient. Choose this 100 mm bore model when intermediate positioning is required, as a plain SAI cylinder only holds at stroke ends and cannot secure a load mid-travel. If locking strictly at the extended or retracted end is acceptable, a SAIL stroke-end lock offers a simpler alternative. For this 125 mm stroke, the M20x1.5 rod thread and 25 mm rod diameter provide excellent rigidity and side-load resistance.
When replacing this unit, match the single-rod configuration, 100 mm bore, 125 mm stroke, PT port threads, and the -S magnet. The correct mounting set for this single-rod profile cylinder includes Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 brackets. Operating pressure must remain between 0.15-0.7 MPa, and the speed range is 30-500 mm/s. Remember to balance pressures before releasing the clamp to prevent sudden rod movement.
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 BSAI100X125S FAQ
The clamp-lock mechanism provides a static holding force of 5500 N. It uses a spring-applied, air-released gripper to hold the single carbon steel rod securely at any position along the 125 mm stroke, independent of the cylinder's 3927 N thrust.
The clamp locks only after the rod has completely stopped and cannot brake a moving load. To release it safely, balanced air pressure must be applied to both sides of the piston via the G1/8 enclasp port; otherwise, the rod may jump abruptly. Safety-critical loads require an additional independent safety measure.
Related AirTAC Lock & Standard Cylinders
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