ETA 2824/2834/2836-429 Balance Axle

Quantity	Discount (%)	Price
1 - 2	—	$16.00
3 - 4	5 %	$15.20
5 - 9	7 %	$14.88
10 - 14	10 %	$14.40
15+	15 %	$13.60

Quantity

Discount (%)

Price

1 - 2

—

$16.00

3 - 4

5 %

$15.20

5 - 9

7 %

$14.88

10 - 14

10 %

$14.40

15+

15 %

$13.60

Quantity	Discount (%)	Price
1 - 2	—	$16.00
3 - 4	5 %	$15.20
5 - 9	7 %	$14.88
10 - 14	10 %	$14.40
15+	15 %	$13.60

Product Description

The ETA 2824/2834/2836-429 Balance Axle is a genuine Swiss-made component for the ETA 2824, 2834, and 2836 automatic movement family. The balance axle (also known as the balance staff) is the central pivot for the balance wheel, serving as the axis around which the balance wheel oscillates and regulates the release of energy from the gear train. This brand new original part is essential for watchmakers restoring correct amplitude and rate accuracy when the original balance staff becomes broken, bent, or worn.

Features & Function

Genuine ETA part – authentic Swiss-made component for ETA 2824/2834/2836 calibers

Balance staff – central pivot for the balance wheel, enabling oscillation

Critical for timekeeping – directly affects amplitude and rate stability

Essential for servicing – a commonly worn component in the 2824 family

Precision-engineered – manufactured to ETA’s original specifications

Specifications

Part Number: 2824/2834/2836-429 / 429

Compatible Movements: ETA 2824-2, 2834-2, 2836-2, 2801, 2804, 2816, 2821, 2826-2, 2828, 2930

Movement Diameter: 25.6 mm (11½”’)

Movement Height: 4.60 mm – 2824-2

Jewels: 25

Frequency: 28,800 vph (4 Hz)

Power Reserve: ~38–40 hours

Shock Protection: Etachocs (Standard/Elaborated grades) / Incabloc (Top/Chronometer grades)

Origin: Switzerland (ETA factory part)

Condition: Brand new

Applications

Service and overhaul of ETA 2824/2834/2836 family movements

Balance staff replacement – replacing broken, bent, or worn pivots

Timekeeping restoration – restoring correct amplitude and rate when balance staff is damaged

Suitable for professional watchmakers and experienced repair technicians

FAQs

1. Is this a genuine ETA part?

Yes, this is a genuine ETA factory part (reference 429), made in Switzerland. The ETA 2824-2 is a 25.6 mm automatic caliber introduced in 1982 and is widely regarded as one of the most robust and reliable mechanical movements in production .

2. Which movements is this balance axle compatible with?

This balance axle is compatible with ETA 2824-2, 2834-2, 2836-2, 2801, 2804, 2816, 2821, 2826-2, 2828, and 2930 calibers. The 2824-2 has a 38-hour power reserve and beats at 28,800 vph .

3. What is the function of the balance staff?

The balance staff is the central axle of the balance wheel. It allows the balance to oscillate freely and precisely, which is fundamental to the movement’s timekeeping accuracy. A broken or bent staff will cause erratic rate or complete stoppage. Along with the hairspring, the balance wheel and staff form a harmonic oscillator that regulates the gear train’s pace .