ANSIMAG K+1516 - 7-c. Detailed Wear Parts Tolerances; Bushing and Shaft Wear Limits; Mouth Ring Groove Depth Specification

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7-c. DETAILED WEAR PARTS TOLERANCES
A) Main bushing C) Mouth ring
B) Pump shaft
Measuring flute depth
Date inspected
DIMENSION
Original
3mo./500hr 12mo./2000hr
Wear
dimension
/ / / / / /
Limits
1.25"
A1-A2 Dia. (in)
(mm)
1.259" dia
3.20 mm
< 1.284"dia
(3.26 mm)
Bushings
A3-A4 Dia. (in)
(mm)
1.259" dia
3.20 mm
< 1.284"dia
(3.26 mm)
B1-B2 Dia. (in)
(mm)
1.259" dia
3.20 mm
< 1.284"dia
(3.26 mm)
B3-B4 Dia. (in)
(mm)
1.259" dia
3.20 mm
< 1.284"dia
(3.26 mm)
1.25"
C1-C2 Dia. (in)
(mm)
1.256" dia
3.19 mm
> 1.250"dia
(3.18 mm)
Shaft
C3-C4 Dia. (in)
(mm)
1.256" dia
3.19 mm
> 1.250"dia
(3.18 mm)
D1-D2 Dia. (in)
(mm)
1.256" dia
3.19 mm
> 1.250"dia
(3.18 mm)
D3-D4 Dia. (in)
(mm)
1.256" dia
3.19 mm
> 1.250"dia
(3.18 mm)
All mouth ring wear surfaces are made with grooves. These grooves provide cooling
Mouth
flow. When new, the grooves are 0.063" [1.60 mm] deep. The minimum groove
Ring
depth is 0.031" [0.79 mm]. Replace when grooves are less the 0.031" [0.79 mm].
* Under normal operating conditions, the shaft should last for many years. When the shaft is subjected to dry running,
thermal stress cracks may develop. If cracks are found, a replacement shaft is necessary to prevent damage to other pump
components.