Instruments for size inspection, rocking type VA

Rocking type inspection instruments for gears and splines are a cost-efficient solution for single productions and small batches. With a bit of skill, the actual dimension over and between balls, i.e. the highest measurement point, can be found by rocking the instrument. We recommend a Frenco UPM-certificate for all VA inspection instruments in order to verify a sufficiently small measuring uncertainty regarding the tolerance to be measured.

Inspection instrument for internal gearing IVA:

VA_IVA
 


The IVA inspection instrument for internal gearing consists of a handle, a measuring head with two measuring ball inserts and a dial indicator. A setting ring with a toothed section is recommended to guarantee only small measuring uncertainties.
  • The measuring head can only be used for a specific size and a specific measuring ball diameter.
  • The clock face of the dial indicator has been chosen for metrology.
Instrument type
  Pitch circle diameter
IVA 0
 4 - 15 mm
IVA 1 15 - 28 mm
IVA 2 28 - 130 mm
IVA 3
 50 - 330 mm
IVA 4 (with measuring force lift-off)
from 190 mm

Inspection instrument for external gearing IVA:

The AVA inspection instrument for external gearing consists of a C-shaped or ring-shaped retainer, two measuring ball inserts and a dial indicator (measuring force = 2N).
  • easier finding of the tooth position with measuring force lift-off,
  • easier finding of the reversal point with the ball track between dial indicator and measuring ball insert,
  • quick and easy adjustment and clamping of the lower measuring ball insert,
  • two heat insulation plates prevent corruption of the measuring results through body heat.
  
VA_Avam-c

AVA C-shape
Calibration is carried out with a setting plug with a toothed section.

Instrument type
  Pitch circle diameter
AVA 1 (with measuring force lift-off)  10 - 30 mm
AVA 2 (with measuring force lift-off) 30 - 50 mm
AVA 3 (with measuring force lift-off) 50 - 70 mm
AVA 4 (with measuring force lift-off) 70 - 90 mm
AVA 5 (with measuring force lift-off)
 90 - 110 mm
AVA 6 (with measuring force lift-off) 110 - 130 mm

Brochure:
Our current brochure 'Size inspection instruments, rocking type' you can download here.