Airtac BSE Clamp Standard Cylinder BSE40X125S
The AirTAC Airtac BSE Clamp Standard Cylinder BSE40X125S is a genuine double-acting ISO 15552 cylinder with an integrated spring-applied, air-released ROD LOCK. If air is cut or an E-stop is hit, the collet clamps the Ø16mm rod and holds up to 900 N in either direction — no drift. Ø40mm bore, 125mm stroke, PT1/4 cylinder ports, G1/8 lock-release port.
- BoreØ40 mm
- Stroke125 mm
- Static holding force900 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/4
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE40X125S
The AirTAC BSE40X125S is a double-acting, single-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. A collet clamps the 16 mm rod to deliver a bidirectional static holding force of 900 N with zero live air. Operating pressure is capped at 0.15-0.7 MPa, and the lock unlocks via a separate G1/8 port.
This fail-safe mechanism prevents vertical loads from drifting if air pressure drops or an E-stop trips. The lock is a holding device, not a dynamic brake; engage it only after the rod fully stops, and allow at least 0.5 s for release once piston pressures balance. Equipped with a -S magnet, it supports CMSE reed and DMSE electronic sensors.
Rod Lock — 900 N Static Holding (Ø40mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE40X125S holds its position in both directions when air is lost, exhausted or an E-stop trips. Apply 0.15–0.7 MPa to the G1/8 release port to unlock. Engage the lock only after the rod has stopped (it is not a dynamic brake), and release only when the pressures on both sides of the piston are balanced. Allow at least 0.5 s for full release before moving.
Airtac BSE Clamp Standard Cylinder BSE40X125S Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE40X125S |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Static holding force | 900 N |
| Cylinder port | PT1/4 |
| Lock-release port | G1/8 |
| Rod thread | M12×1.25 |
|---|---|
| Operating pressure | 0.15 – 0.7 MPa |
| Unlocking pressure | 0.15 – 0.7 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 800 mm |
Specifications follow the official AirTAC BSE datasheet. The lock uses the SE standard body; SE mounting accessories fit BSE except FTC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa (max) | 880 N | — |
| Max drive (@0.7 MPa) | 90 kgf | |
Drive force is separate from the 900 N static holding force of the lock. BSE operates up to 0.7 MPa. Size with a safety margin.
Model Code: Airtac BSE Clamp Standard Cylinder BSE40X125S
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 40 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Thread: PT (blank) / G. Mounting (BSE): Basic, LB, FA, FB, CA, CB, CR, TC (FTC is not available on BSE). Related: SE (no lock), BSED (double-rod rod lock). Sensors CMSE/DMSE fit magnetic BSE.
Where the Airtac BSE Clamp Standard Cylinder BSE40X125S Is Used
Pneumatic Vertical Lift
Holds a 900 N vertical load on an assembly lift in place during an E-stop, preventing backdriving when main air exhausts.
Tooling Clamp Hold
Secures a machining fixture with 628 N push at 0.5 MPa, then locks the 16 mm rod to maintain the clamp if shop air drops.
Safety Gate Stop
Locks a machine access gate instantly at its position, using the spring-applied collet to keep it shut until balanced air releases it.
Is the Airtac BSE Clamp Standard Cylinder BSE40X125S the Right Cylinder?
Verify your suspended load stays under the 900 N static holding force. If you need less drive, the 32 mm bore offers 402 N push at 0.5 MPa and a 600 N hold. For heavier lifting, the 50 mm bore provides 982 N push at 0.5 MPa and a 1400 N hold. To replace this unit, match the 40 mm bore, 125 mm stroke, PT1/4 cylinder port, and -S magnet. SE mounting accessories fit this body except FTC. For this 125 mm stroke, standard guide rails should adequately manage side loads without requiring external guides.
Quick checklist
- ✓ Load to hold ≤ 900 N?
- ✓ Fail-safe hold on air loss / E-stop needed
- ✓ Lock engaged only when stopped
- ✓ G1/8 release-air line available
- ✓ Magnet (-S) for CMSE/DMSE sensors?
Installation & Safety Notes
- check Engage the lock only after the rod has stopped — not as a dynamic brake.
- check Release only when both piston sides are pressure-balanced.
- check Allow ≥0.5 s for full release before commanding motion.
- check Feed the G1/8 release port with 0.15–0.7 MPa clean air.
- check Add safety-rated controls for man-rated / overhead loads.
- check Use SE mounting accessories (FTC excepted).
Airtac BSE Clamp Standard Cylinder BSE40X125S FAQ
The spring-applied collet clamps the rod, providing a 900 N bidirectional static hold with no live air. It is a fail-safe lock, not a dynamic brake; engage it only after the rod stops, and allow >=0.5 s for release.
Drive force is separate from the hold. At 0.5 MPa, push is 628 N and pull is 528 N. At the 0.7 MPa ceiling, push is 879 N (max 90 kgf). The lock provides a 900 N static hold.
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