Airtac BSED Clamping Double Acting Cylinder BSED125X80S
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X80S combines a double-rod ISO 15552 cylinder — a Ø32mm rod out BOTH ends for equal force both directions — with an integrated spring-applied, air-released ROD LOCK that holds up to 8600 N in either direction if air is lost. Ø125mm bore, 80mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke80 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSED Clamping Double Acting Cylinder BSED125X80S
The AirTAC BSED125X80S is a double-acting, double-rod ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. A rod exits both ends, yielding equal force and speed in both directions. It delivers 5734 N of drive force each way at 0.5 MPa and 8028 N at 0.7 MPa.
The fail-safe collet lock provides a bidirectional static holding force of 8600 N without requiring live air. If pressure drops or an E-stop trips, the rod is securely clamped at its stopped position. The lock uses a dedicated G1/8 release port and engages only after motion ceases, distinguishing it from a dynamic brake.
Double Rod + 8600 N Rod Lock (Ø125mm)
A rod exits both ends for symmetric force and back-rod tooling, and a spring clamps the collet so the Airtac BSED Clamping Double Acting Cylinder BSED125X80S holds its position in both directions on air loss or E-stop. Apply 0.15–0.7 MPa to the G1/8 release port to unlock. Engage only after the rod has stopped (not a dynamic brake), and release only when both piston sides are pressure-balanced; allow ≥0.5 s for full release.
Airtac BSED Clamping Double Acting Cylinder BSED125X80S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X80S |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 80 mm |
| Static holding force | 8600 N |
| Cylinder port | PT1/2 |
| Lock-release port | G1/8 |
| Configuration | Double rod, double acting |
|---|---|
| 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 – 500 mm/s |
| Max stroke | Up to 1000 mm |
Specifications follow the official AirTAC BSED datasheet. Rod thread M27×2 both ends. Mounting (BSED): Basic, LB, FA, TC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø125mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 5734 N |
| 0.7 MPa (max) | 8027 N |
| Max drive (@0.7 MPa) | 819 kgf |
A rod exits both ends, so force is equal on extend and retract. Drive force is separate from the 8600 N static lock holding force. Size with a safety margin.
Model Code: Airtac BSED Clamping Double Acting Cylinder BSED125X80S
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Thread: PT (blank) / G. Mounting (BSED): Basic, LB, FA, TC. Related: SED (double rod, no lock), BSE (single-rod rod lock). Sensors CMSE/DMSE fit magnetic BSED.
Where the Airtac BSED Clamping Double Acting Cylinder BSED125X80S Is Used
Heavy Machining Fixtures
Holds large workpieces securely during heavy milling with 8028 N of equal both-way clamping drive, while the 8600 N fail-safe lock prevents drift if shop air drops.
Vertical Lift Stations
Raises and lowers heavy platens with symmetric force, relying on the spring-applied collet to arrest the 32 mm rod safely upon an E-stop signal.
Symmetric Transfer Arms
Moves substantial bulk materials back and forth with identical push and pull dynamics, using the rear rod for anti-rotation flag mounting.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X80S the Right Cylinder?
Select this 125 mm bore model when your payload demands the maximum both-way drive (819 kgf at 0.7 MPa) alongside an 8600 N static hold. If your load requires less force, the 100 mm bore provides 3681 N at 0.5 MPa with a 5500 N hold; if you need even more drive force, this is the largest standard bore available. Always verify the load to hold is under 8600 N. Engage the lock only after the rod stops, and release it only when both piston sides are pressure-balanced, allowing at least 0.5 s. For exact replacement, match the 80 mm stroke, PT1/2 port, mounting choice (Basic, LB, FA, or TC), and the -S magnet for CMSE or DMSE sensors.
Quick checklist
- ✓ Need both symmetric force AND fail-safe hold?
- ✓ Load to hold ≤ 8600 N?
- ✓ Back-rod space for tooling/flag
- ✓ Lock engaged only when stopped
- ✓ G1/8 release-air line available
Installation & Safety Notes
- check Engage the lock only after the rod has stopped — not 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 Support both rod ends; avoid side load.
- check Use BSED mounting (Basic/LB/FA/TC).
Airtac BSED Clamping Double Acting Cylinder BSED125X80S FAQ
The spring-applied collet immediately clamps the 32 mm rod, delivering an 8600 N bidirectional static holding force to keep the load safely in place without any live air. It is a fail-safe hold, not a dynamic brake, so it must engage only after the rod stops.
The double-rod design yields equal drive force both ways: 5734 N at 0.5 MPa and 8028 N at 0.7 MPa (max 819 kgf). The static holding force of the lock is 8600 N. Operating pressure is 0.15-0.7 MPa, and the speed range is 30-500 mm/s.
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