Airtac BSAI Locking Clamp Cylinder BSAI40X700
The AirTAC Airtac BSAI Locking Clamp Cylinder BSAI40X700 is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 700mm 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 900 N.
- BoreØ40 mm
- Stroke700 mm
- Cylinder portG1/4
- TypeSingle rod (BSAI)
- Enclasp portG1/8
- Rod threadM12×1.25
- 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 BSAI40X700
The AirTAC BSAI40X700 is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released clamp-lock. It secures the 16mm carbon steel piston rod at any point along its 700mm travel, delivering a static holding force of 900 N. The cylinder itself generates 628 N of thrust at 0.5 MPa (879 N at 0.7 MPa). Remember that holding force and thrust are distinct metrics: you must size the 900 N clamp capacity against your static load, not the cylinder's push thrust.
This unit features a third G1/8 enclasp port alongside its 1/4 PT cylinder ports to release the brake. Do not confuse the variable air cushions with the lock; cushions only decelerate the piston near stroke ends, while the mechanical clamp provides the actual holding power. Because the stroke is 700mm, an external guide is recommended to prevent excessive side-loading on the rod.
Airtac BSAI Locking Clamp Cylinder BSAI40X700 Technical Specifications
| Model | Airtac BSAI Locking Clamp Cylinder BSAI40X700 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 700 mm |
| Type | Single rod (BSAI), double acting |
| Cylinder port | G1/4 |
| Rod thread | M12×1.25 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 900 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 800 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 (Ø40 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa (max) | 880 N | — |
Push/pull as tabulated. Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (900 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAI Locking Clamp Cylinder BSAI40X700 Is Used
Vertical Axis Holding
Prevents gravity-driven drops on vertical actuators by clamping the rod securely at any mid-stroke elevation during operation.
Power Loss Safety
Engages the 900 N spring-applied brake instantly upon air loss, holding the load firmly in place anywhere along the 700mm travel.
Machining Position Hold
Locks the workpiece at a precise intermediate machining coordinate without relying on continuous pneumatic pressure.
Is the Airtac BSAI Locking Clamp Cylinder BSAI40X700 the Right Clamp-Lock?
Select this 40mm bore model when a process requires mid-stroke holding rather than just end-of-stroke stopping, a scenario where a SAIL cylinder fails. If your load requires less holding power, the 32mm bore offers 600 N holding force and 402 N thrust at 0.5 MPa. If you need more security, the 50mm bore provides 1400 N holding force and 982 N thrust. A plain SAI cylinder suffices if no mid-travel clamping is needed.
This BSAI40X700 locks only after the rod has completely stopped; it cannot brake a moving load. Unlocking requires balanced air pressure on both sides of the piston to prevent abrupt rod movement. For human-safety applications, add an independent external safety measure. This single-rod configuration accepts Basic, FA, FB, CA, CB, CR, LB, TC, TCM1, and TCM2 mounts. It uses PT ports and lacks a magnet (-S) for CMSE or DMSE sensors.
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 BSAI40X700 FAQ
The BSAI40X700 provides a static holding force of 900 N. It locks bidirectionally at any position along the 700mm stroke, but it only engages after the rod has stopped moving.
The clamp is released via the G1/8 enclasp port, but only after the air pressures on both sides of the piston are balanced. Releasing the clamp with unbalanced pressure causes the rod to jump abruptly. Always add an independent safety measure for human-safety loads.
Related AirTAC Lock & Standard Cylinders
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