Jet Circulation, Air Bearing
DIAMETER
FORMATION TYPE
PIN SIZE
APPX. WT.
in
mm
very soft
soft
medium
hard
-
lbs
kg
5 1/8
131
-
-
WLS 60
-
2 7/8
22
10
5 5/8
143
-
WLS 50
-
-
3 1/2
25
11.4
5 7/8
149
-
WLS 50
WLS 60
-
3 1/2
30
13.6
6
-
-
WLS 50
WLS 60
-
3 1/2
30
13.6
6 1/4
158
-
-
WLS 60
-
3 1/2
35
15.9
6 3/4
171
-
WLS 50
WLS 60
WLS 70
3 1/2
45
20.4
7 7/8
200
-
WLS 50
WLS 60
-
4 1/2
75
34.0
9
229
-
WLS 50
WLS 60
-
4 1/2
95
43.2
9 7/8
251
-
WLS 50
WLS 60
WLS 70
6 5/8
145
67.0
10 5/8
270
WLS 40
WLS 50
WLS 60
-
6 5/8
155
77.5
12 1/4
311
WLS 40
WLS 50
WLS 60
WLS 70
6 5/8
225
102.3
 
Regular Circulation, Air Bearing
(Direct Reverse Circulation)
DIAMETER
FORMATION TYPE
PIN SIZE
APPX. WT.
in
mm
very soft
soft
medium
hard
-
lbs
kg
5 1/8
131
-
-
WLS 60
-
2 7/8
15
6.8
5 1/4
133
-
WLS 50
-
-
2 7/8
18
8.2
5 3/8
136
-
WLS 50
-
-
2 7/8
18
8.2
5 7/8
149
-
-
WLS 60
-
3 1/2
30
13.6
 
Regular Circulation, Air Bearing
(Direct Reverse Circulation)
DIAMETER
FORMATION TYPE
PIN SIZE
APPX. WT.
in
mm
very soft
soft
medium
hard
-
lbs
kg
5 1/8
131
-
WLS 121
WLS 60
-
2 7/8
10
4.5