Rockford Balance Staffs

Staff Measurements Explanation

A = Overall Height (Length)

B = Distance from Roller Seat to Pivot

F = Hairspring Collect Hole

G = Balance Arm Hole

H = Roller Hole

18 Size Rockford Factory # 340 Description: Dimension: A 6.10 mm, B 3.80 mm, F 1.00 mm, G 1.38 mm, H 0.65 mm

22BB134
$18.00
 

18 Size Rockford Factory # 341 Description: Dimension: A 6.19 mm, B 3.87 mm, F 0.99 mm, G 1.38 mm, H 0.64 mm

22BB135
$18.00
 

18 Size Rockford Factory # 880 Description: Dimension: A 6.09 mm, B 3.80 mm, F 0.93 mm, G 1.31 mm, H 0.1.15 mm

22BB139
$18.00
 

18 Size Rockford Factory # 344/342 Description: Dimension: A 6.98 mm, B 4.00 mm, F 0.92 mm, G 1.27 mm, H 0.64 mm

22BB136
$18.00
 

16 Size Rockford Factory # 729 Description: Double Roller Dimension: A 5.68 mm, B 3.01 mm, F 0.86 mm, G 1.26 mm, H 1.12 mm A = Length, B = Distance Roller/Pivot, F = Hairspring Pivot, G = Balance Arm Hole, H = Roller Hole

22BB142
$18.00
 

16 Size Rockford Factory # 520 Description: Short, Single Roller Dimension: A 5.57 mm, B 3.03 mm, F 0.90 mm, G 1.26 mm, H 0.63 mm A = Length, B = Distance Roller/Pivot, F = Hairspring Pivot, G = Balance Arm Hole, H = Roller Hole

22BB141
$18.00
 

16 Size Rockford Factory # 739 Description: Dimension: A 5.58 mm, B 3.04 mm, F 0.88 mm, G 1.23 mm, H 0.74 mm A = Length, B = Distance Roller/Pivot, F = Hairspring Pivot, G = Balance Arm Hole, H = Roller Hole

22BB143
$18.00
 

16 Size Rockford Factory # 519 Description: Dimension: A 5.86 mm, B 2.99 mm, F 0.91 mm, G 1.28 mm, H 0.64 mm

22BB140
$18.00
 

16 Size Rockford Factory # 522 Description: Dimension: A 6.30 mm, B 3.74 mm, F 0.88 mm, G 1.25 mm, H 0.63 mm A = Length, B = Distance Roller/Pivot, F = Hairspring Pivot, G = Balance Arm Hole, H = Roller Hole

22BB140A
$25.00
 

# 519 Single Roller A:5.86 mm B:2.99 mm F:0.91 mm G: 1.28 mm H:0.64 mm
# 520 Single Roller A:5.57 mm B:3.03 mm F:0.90 mm G: 1.26 mm H:0.63 mm
# 739 Single Roller A:5.58 mm B:3.04 mm F:0.88 mm G: 1.23 mm H:0.74 mm
# 729 Double Roller A:5.68 mm B:3.01 mm F:0.86 mm G: 1.26 mm H:1.12 mm
A = Length, B = Distance Roller/Pivot, F = Hairspring Pivot, G = Balance Arm Hole, H = Roller Hole