Airtac BSED Clamping Double Acting Cylinder BSED125X700S
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X700S 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, 700mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke700 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSED Clamping Double Acting Cylinder BSED125X700S
The AirTAC BSED125X700S is a double-acting, double-rod ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. A Ø32 mm rod exits both ends, delivering equal thrust and speed in both directions—about 5734 N each way at 0.5 MPa. The collet lock provides an 8600 N bidirectional static holding force, clamping the rod instantly upon air loss or E-stop activation.
This 125 mm bore unit features a PT1/2 cylinder port and a separate G1/8 lock-release port. The extruded aluminum barrel has no external tie rods, and the included -S magnet supports CMSE reed and DMSE electronic sensors. Operating pressure is capped at 0.7 MPa, and the 700 mm stroke uses adjustable air cushions at both ends to manage kinetic energy.
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 BSED125X700S 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 BSED125X700S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X700S |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 700 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 BSED125X700S
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×700 | 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 BSED125X700S Is Used
Heavy Vertical Lifts
Holds massive platens securely in place during air loss, preventing gravity-driven drops with 8600 N of static holding force.
Symmetric Machining Jigs
Uses the equal 8028 N both-way force to clamp and release parts from either direction, ensuring balanced tooling pressure.
Pallet Stop Gates
Locks heavy pallet stops mid-cycle on conveyors, using the rear rod for cam feedback while the front rod absorbs impact.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X700S the Right Cylinder?
Select this 125 mm bore model when your application demands both symmetric drive force and fail-safe holding up to 8600 N. If your load requires less force, step down to the 100 mm bore, which provides 3681 N at 0.5 MPa and a 5500 N hold. As the largest standard bore, there is no larger step-up; for extreme loads, consider dual parallel setups. Always verify your static load is at or below 8600 N.
Because the 700 mm stroke is long, use external linear guides to prevent side-loading and premature seal wear. Engage the lock only after the rod stops moving, and release it only when both piston sides are pressure-balanced, allowing at least 0.5 s for the transition. Replacement units must match the 125 mm bore, 700 mm stroke, PT thread, and -S magnet.
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 BSED125X700S FAQ
The integrated spring-applied collet immediately clamps the rod, providing a 8600 N bidirectional static hold with no live air. It is a fail-safe holding lock, not a dynamic brake, so it must only be engaged after the rod has stopped moving.
The equal both-way drive force is 5734 N at 0.5 MPa and 8028 N at 0.7 MPa (max 819 kgf). The static holding force is 8600 N. Operating speed is 30-500 mm/s, and the operating pressure ceiling is 0.7 MPa.
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