Airtac BSED Clamping Double Acting Cylinder BSED125X800S
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X800S 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, 800mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke800 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSED Clamping Double Acting Cylinder BSED125X800S
The AirTAC BSED125X800S is a double-acting, double-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. A rod exits both ends, providing equal force and speed in both directions—delivering 5734 N each way at 0.5 MPa. The rear rod is ideal for mounting flags or anti-rotation tooling.
This unit delivers a massive 8600 N bidirectional static holding force. If air pressure drops or an E-stop trips, the collet clamps the rod to hold position securely. It features a separate G1/8 release port, a 40 mm cushion length, and an M27x2 rod thread. The -S magnet supports CMSE and DMSE sensors.
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 BSED125X800S 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 BSED125X800S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X800S |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 800 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 BSED125X800S
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×800 | 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 BSED125X800S Is Used
Heavy Vertical Lifts
Holds massive vertical platens up to 8600 N securely during air loss, while the 8028 N both-way drive ensures stable up and down movement.
Press Ejection
Rear rod drives a flag cam for timing while the front rod ejects parts, with the collet locking the 800 mm stroke mid-cycle safely.
Large Mold Transfer
Moves heavy injection molds symmetrically, engaging the fail-safe lock to hold the 819 kgf load rigidly during loader transitions.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X800S the Right Cylinder?
Select this 125 mm bore model when your application demands both symmetric drive power and fail-safe holding up to 8600 N. Verify your load stays under 8600 N; if you need less force, the 100 mm bore provides 3681 N at 0.5 MPa and 5500 N holding. If stepping up, note 125 mm is the largest standard BSED size. Operating pressure is capped at 0.7 MPa, yielding 8028 N of drive force and a maximum 819 kgf drive capacity.
For this 800 mm stroke, use a guide rail to prevent side loads from damaging the seals. Engage the lock only after the rod completely stops, and release it only when both piston sides are pressure-balanced, allowing at least 0.5 s. Mounting options include Basic, LB, FA, and TC. To replace, match the 125 mm bore, 800 mm stroke, PT1/2 port, and magnet option.
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 BSED125X800S FAQ
The equal both-way drive force is 5734 N at 0.5 MPa and 8028 N at 0.7 MPa, with a maximum drive capacity of 819 kgf. The static fail-safe holding force of the integrated rod lock is 8600 N.
The spring-applied collet clamps the rod instantly upon air loss or E-stop, holding the load without live air. To release safely, pressure-balance both piston sides and apply air to the G1/8 release port, allowing at least 0.5 s before moving.
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