Blancpain Silicon Balance Wheel For Caliber 6651 (return broken part)

Brand

Frequency

21600
28800

Clear

Quantity	Discount (%)	Price
1 - 2	—	$1,300.00
3 - 4	5 %	$1,235.00
5 - 9	7 %	$1,209.00
10 - 14	10 %	$1,170.00
15+	15 %	$1,105.00

Quantity

Discount (%)

Price

1 - 2

—

$1,300.00

3 - 4

5 %

$1,235.00

5 - 9

7 %

$1,209.00

10 - 14

10 %

$1,170.00

15+

15 %

$1,105.00

Product Description

This is a genuine Blancpain original factory silicon balance wheel assembly, including the silicon hairspring and balance wheel, specifically designed for the ultra‑thin Caliber 1151 automatic movement. This caliber powers the iconic Villeret 6651 collection, measuring just 3.25 mm in thickness while delivering an impressive 100‑hour power reserve through 210 components and 28 jewels. The fundamental differentiator of this part is its non‑magnetic silicon hairspring and the adoption of a free‑sprung balance with gold micro‑regulation screws—replacing the traditional index regulator for superior isochronism. This silicon component ensures that the movement‘s precision is unaffected by magnetic fields from smartphones, handbags, or airport scanners.

Features & Function

Quantity	Discount (%)	Price
1 - 2	—	$1,300.00
3 - 4	5 %	$1,235.00
5 - 9	7 %	$1,209.00
10 - 14	10 %	$1,170.00
15+	15 %	$1,105.00

Genuine Quality: Manufactured by Blancpain Switzerland, brand new, each assembly undergoes independent precision dynamic balancing and factory calibration.

Compatible Movement: Blancpain Caliber 1151 automatic ultra‑thin movement (27.4mm diameter, 3.25mm thickness, 28 jewels).

Silicon Core Components: This assembly includes a silicon balance wheel, a silicon balance spring, and a free‑sprung regulation system. Compared to traditional Nivarox springs, silicon is corrosion‑ and magnetism‑proof, eliminating the most common source of rate variation.

Frequency Versions (Interchangeability): This part is offered in two frequency specifications: 21,600 vph (3 Hz) and 28,800 vph (4 Hz). These correspond to different production variations of Caliber 1151. Repairers must match the original movement‘s specification by checking the movement number or using the official parts catalog.

Free‑Sprung Fine Regulation: The balance wheel incorporates four gold regulation screws. By rotating these screws in extremely fine increments (e.g., a quarter‑turn of one screw can equal a specific seconds‑per‑day adjustment), a watchmaker can correct positional rate errors without touching the hairspring.

Anti‑Magnetic Performance: The silicon balance spring is non‑magnetic. However, other ferrous parts of the movement may still be magnetized. Professionals recommend checking the condition of the soft‑iron shielding rings above and below the movement when installing this new component.

Exchange Part Policy: As a component protected by Blancpain‘s intellectual property, this part is not available for general parts sale. Each new unit is released only upon return of the genuine, damaged original from the movement being serviced, ensuring full traceability by the brand.

FAQ

Q1: What is the fundamental difference between this silicon balance assembly and a traditional metal one?
A: The core differences are the hairspring material and the regulation system.

Traditional Metal: The hairspring is made of Nivarox (an iron‑nickel alloy) and can magnetize easily. Regulation is done with an index mechanism.

Silicon (This Part): The hairspring is a single crystal of silicon, which is completely non‑magnetic. Regulation is performed by a free‑sprung balance with gold micro‑regulation screws.

Q2: Does a silicon hairspring make the watch completely immune to magnetism?
A: No, not entirely. The silicon hairspring itself will not magnetize, but other steel components in the movement (escape wheel, pallet fork, screws) still can. If exposed to a very powerful magnetic field, the movement could still be affected.

Q3: Can I install a 28,800 vph balance assembly into a 21,600 vph movement?
A: Absolutely not. Even if they look similar, the hairspring stiffness and balance inertia are completely different. The escapement geometry is matched to the specific frequency. The movement will not oscillate.

Q4: Will replacing the balance assembly automatically restore the 100‑hour power reserve?
A: No. The balance wheel only manages the release of energy. The power reserve is determined by the mainspring barrel and the efficiency of the gear train. If the mainspring is tired or the barrel is dry, the power reserve will remain low. Re‑greasing the barrel and changing the mainspring are required for full restoration.

Q5: If a gold regulating screw is loose, can I use glue to secure it?
A: Absolutely not. Glue will permanently alter the regulating weight of the screw and will prevent any future adjustment. The affected part must be replaced under the exchange policy.