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Die Casting Tolerance Guide

The document discusses recommended fits for parts used in pressure die casting. It lists 19 items with descriptions of the type of fit and recommended tolerance grades for holes and shafts. Common tolerance grades included are H7/g6 for close running fits, H7/k6 for light keying fits, and H7/m6 for medium drive fits. The tolerance grades provide clearances or interference between holes and shafts within a range of 7 to 41 microns.

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Jyoti Kale
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587 views6 pages

Die Casting Tolerance Guide

The document discusses recommended fits for parts used in pressure die casting. It lists 19 items with descriptions of the type of fit and recommended tolerance grades for holes and shafts. Common tolerance grades included are H7/g6 for close running fits, H7/k6 for light keying fits, and H7/m6 for medium drive fits. The tolerance grades provide clearances or interference between holes and shafts within a range of 7 to 41 microns.

Uploaded by

Jyoti Kale
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
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Please select the Please select the

Pleae Enter the Basic


Tolerance grade Tolerance grade
Size in mm
for Hole for Shaft

BASIC SIZE HOLE SHAFT


`

20 H7 g6 `

Enter
Enterthe
theBasic
BasicSize
Size
and
andTolerance
Tolerancegrades
grades
HOLE SHAFT
` 21 -7
`
0 -20
`
20 20

Maximum Clearance/
41
Interferance (Microns)

Minimum Clearance/
7
Interferance (Microns)
RECOMMONDED FITS USED IN PRESSURE DIE CASTING
Sl.No. DESCRIPTION TYPE OF FIT TOLERANCE
1 Main guide pillar-Main guide bush Slack running fit
2 Main guide pillar-Main guide bush Close running fit H7/g6
3 Main guide pillar & bush housing Light keying fit H7/k6
4 Sprue bush-Cavity insert or housing Medium drive fit H7/m6
5 Core pin - Cavity insert Slide fit H7/h6
6 Side moving core or sliding block -Guide slot Close running fit H7/g6
7 Cavity insert housing Light keying fit H7/k6
8 Finger cam housing Light keying fit H7/k6
9 Push back pin-Cavity insert or cavity nest Close running fit H7/g6
10 Ejector pin-Cavity insert Close running fit H7/g6
11 Cavity insert Slide fit H7/h6
12 Alignment bush-Housing Close running fit H7/g6
13 Ejector guide pin-Housing Medium drive fit H7/m6
14 Ejector guide pin-Ejector guide bush Close running fit H7/g6
15 Ejector guide pin-Ejector guide bush Slack running fit
16 Ejector guide bush-Ejector retainer Light keying fit H7/k6
17 Ejector guide bush-Ejector plate Running fit H7/f7
18 Rest button-Housing Heavy drive fit H7/m6
19 Shot sleeve -sprue bush Running fit H7/f7
Mold H7
Die Casting H8

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