"One Twist" Indicator Arms (Hydraulic & Mechanical)

ECE Indicator Arms Features
  • "One Twist" 360˚ adjustable joints
  • Check concentricity on bench or
    your machine
  • Powerful magnetic base
Advantages of Hydraulic Arms
  • Hydraulic arms are faster, stronger, and more precise than mechanical joints
  • Hydraulic joints make fine adjustments easy because they don't lose position when loosened like mechanical arms


Indicator Arms are used to check concentricity on bench or machine. Dial Indicators not included.


ECE-300 series

ECE-330 series

ECE-340
Part No. Description Arm Length Base Dim.
Lmm x Wmm x H
Holding Power Weight lb.
ECE-300ALL Precision hydraulic arm, gold 23 1/2" 4 3/4"mm x 2"mm x 2 1/8" 352 lbs. 7.75
ECE-300AL Precision hydraulic arm, gold 16 3/4" 3 1/8"mm x 2"mm x 2 1/8" 220 lbs. 5.5
ECE-300B Precision hydraulic arm, gold 13 3/8" 2 3/8"mm x 2"mm x 2 1/8" 176 lbs. 4.5
ECE-330AL Precision mechanical arm, red 16 3/4" 3 1/8"mm x 2"mm x 2 1/8" 220 lbs. 5
ECE-330B Precision mechanical arm, red 13 3/8" 2 3/8" x 2" x 2 1/8" 176 lbs. 3.75
ECE-340 Standard mechanical arm, red 13 3/8" 2 3/8" x 2" x 2 1/8" 176 lbs. 3.5