Airtac BSED Clamping Double Acting Cylinder BSED125X900
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X900 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, 900mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke900 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
- 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 BSED Clamping Double Acting Cylinder BSED125X900
The AirTAC BSED125X900 is a double-acting, double-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. A rod exits both ends, delivering equal force in both directions at 5734 N each way at 0.5 MPa. The collet lock provides a bidirectional static holding force of 8600 N, securing the load safely with zero live air.
This 125 mm bore unit operates at 0.15-0.7 MPa with a speed range of 30-500 mm/s. It features a PT1/2 cylinder port, a separate G1/8 lock-release port, and 40 mm adjustable air cushions at both ends. This SKU ships without a magnet, meaning position sensing via CMSE or DMSE sensors is not supported.
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 BSED125X900 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 BSED125X900 Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X900 |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 900 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 BSED125X900
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×900 | 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 BSED125X900 Is Used
Heavy Vertical Lifts
Holds 8600 N against gravity drops during air loss, while the 8028 N both-way drive powers heavy vertical lifting and lowering cycles.
Large Press Positioning
Uses the rear rod for anti-rotation tooling or cam flags, ensuring symmetric 5734 N push-pull force for large press stages.
Oversized Pallet Stopping
Locks a 900 mm stroke securely to halt heavy pallets, maintaining position without live air while managing long side loads.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X900 the Right Cylinder?
Select this model when you need both symmetric drive force and fail-safe hold for heavy loads. Verify your load does not exceed the 8600 N holding capacity. If you require less force, the next bore down is 100 mm, providing 3681 N drive force at 0.5 MPa and a 5500 N hold. As the largest bore, there is no larger standard option. Engage the lock only after the rod stops, and release it only when both piston sides are pressure-balanced, allowing at least 0.5 seconds. At 900 mm stroke, ensure external guides are used to manage side loads and prevent rod deflection. Replacement matches require the exact 125 mm bore, 900 mm stroke, PT port, and mounting choice (Basic, LB, FA, or TC).
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 BSED125X900 FAQ
The spring-applied collet immediately clamps the rod, delivering a bidirectional static holding force of 8600 N to maintain position without live air. It is a fail-safe hold, not a dynamic brake.
The drive force is equal both ways: 5734 N at 0.5 MPa and 8028 N at 0.7 MPa, with a max drive of 819 kgf. The separate static holding force of the lock is 8600 N.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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