Austro Engine E4 Series User Manual

E4 Series
Maintenance Manual
Standard
Procedures
Page 220
E4.08.04
Rev.29
70 - Maintenance Procedures
01-Jul-2020
Nominal
thread Ø
Pitch
Fully cut thread
useable thread depth
nominal length of
insert
Screw-in length for
screw if driven tang is
not removed
Core
hole Ø
D
1HC
min.
Drill
Outside
Ø
¼”-28
UNF
0.90
1 d
6.4
5.9
6.7
7.53
1.5 d
9.5
9.0
6.55
2.0 d
12.7
12.2
6.72
2.5 d
15.9
15.4
Table 5 Installation values for threaded inserts
2. Special Tools
Number
Description
Dimensions
1.
Twist drill (B)
-
2.
Screw thread insert tap
-
3.
Thread cutting tap
-
4.
Insertion mandrel
-
5.
Tag breaker
3. Install the threaded insert
Detail Steps/Work Items
Key Items/References
(1)
Drill out the damaged thread with drill size (B).
Refer to Table 5 for the
recommended diameters to drill the
core hole (D
1HC
).
Use only pocket drills to cut the pocket holes.
(2)
Deburr the hole.
(3)
Clean the damaged thread.
Use compressed air to remove
grease, chips or contamination.
(4)
Cut the new thread in the hole until the end
stop or through, as applicable.
To obtain the necessary thread depth on pocket holes, remove the
remaining chips regularly.
(5)
Clean the thread.
Use compressed air to remove
grease, chips or contamination.
(6)
Install the insert on insertion mandrel.
Refer to Table 5 for the external
thread diameter of the insert.

Austro Engine E4 Series Specifications

General

Brand	Austro Engine
Model	E4 Series
Category	Engine
Language	English