3780 Cobalt Jobber-Length Drill Bits - Grainger Industrial Supply

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Product Categories
Machining
Drilling & Holemaking
Drill Bits
Drill Bits for Metal & Plastic
Jobber-Length Drill Bits
Cobalt Jobber-Length Drill Bits
3780 Cobalt Jobber-Length Drill Bits

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Measurement System

Fractional Inch & Metric

Fractional inch and metric are measurement systems used to indicate the size of drill bits that have standard trade sizes.

Letter

Letter-size drill bits are each assigned a trade letter size that indicates their compatibility with other bits that have the same trade letter size. The larger the letter size, the larger the drill bit.

Wire

Wire-size drill bits are each assigned a wire size that matches an American Wire Gauge (AWG) size, which helps ensure compatibility when inserting wires into holes made by the bits. The larger the wire size, the smaller the drill bit.

Fractional Inch
Letter
Wire

Drill Bit Size

Drill bit size is the diameter of a drill bit, which determines the diameter of a hole that can be created by the bit during drilling tasks.

Search Drill Bit Size

#60
#59
#58
#57
#56
#55
#54
#53
#52
#51
#50
#49
#48
#47
#46
#45
#44
#43
#42
#41
#40
#39
#38
#37
#36
#35
#34
#33
#32
#31
#30
#29
#28
#27
#26
#25
#24
#23
#22
#21
#20
#19
#18
#17
#16
#15
#14
#13
#12
#11
#10
#9
#8
#7
#6
#5
#4
#3
#2
#1
3/64 in
1/16 in
5/64 in
3/32 in
7/64 in
1/8 in
9/64 in
5/32 in
11/64 in
3/16 in
13/64 in
7/32 in
15/64 in
1/4 in
17/64 in
9/32 in
19/64 in
5/16 in
21/64 in
11/32 in
23/64 in
3/8 in
25/64 in
13/32 in
27/64 in
7/16 in
29/64 in
15/32 in
31/64 in
1/2 in
A
B
C
D
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z

Decimal Equivalent

Search Decimal Equivalent

0.0400
0.0410
0.0420
0.0430
0.0465
0.0469
0.0520
0.0550
0.0595
0.0625
0.0635
0.0670
0.0700
0.0730
0.0760
0.0781
0.0785
0.0810
0.0820
0.0860
0.0890
0.0935
0.0938
0.0960
0.0980
0.0995
0.1015
0.1040
0.1065
0.1094
0.1100
0.1110
0.1130
0.1160
0.1200
0.1250
0.1285
0.1360
0.1405
0.1406
0.1440
0.1470
0.1495
0.1520
0.1540
0.1563
0.1570
0.1590
0.1610
0.1660
0.1695
0.1719
0.1730
0.1770
0.1800
0.1820
0.1850
0.1875
0.1890
0.1910
0.1935
0.1960
0.1990
0.2010
0.2031
0.2040
0.2055
0.2090
0.2130
0.2188
0.2210
0.2280
0.2340
0.2344
0.2380
0.2420
0.2460
0.2500
0.2570
0.2610
0.2656
0.2660
0.2720
0.2770
0.2810
0.2813
0.2900
0.2950
0.2969
0.3020
0.3125
0.3160
0.3230
0.3281
0.3320
0.3390
0.3438
0.3480
0.3580
0.3594
0.3680
0.3750
0.3770
0.3860
0.3906
0.3970
0.4040
0.4063
0.4130
0.4219
0.4375
0.4531
0.4688
0.4844
0.5000

Flute Length

Search Flute Length

1/2 in
5/8 in
11/16 in
3/4 in
13/16 in
7/8 in
15/16 in
1 in
1-1/16 in
1-1/8 in
1-3/16 in
1-1/4 in
1-5/16 in
1-3/8 in
1-7/16 in
1-1/2 in
1-11/16 in
1-3/4 in
1-13/16 in
1-7/8 in
1-15/16 in
2 in
2-1/16 in
2-1/8 in
2-3/16 in
2-1/4 in
1-9/16 in

Shank Diameter

Search Shank Diameter

1/32 in
3/64 in
1/16 in
5/64 in
3/32 in
7/64 in
1/8 in
9/64 in
5/32 in
11/64 in
3/16 in
13/64 in
7/32 in
15/64 in
1/4 in
17/64 in
9/32 in
19/64 in
5/16 in
21/64 in
11/32 in
23/64 in
3/8 in
25/64 in
13/32 in
27/64 in
7/16 in
15/32 in
31/64 in
1/2 in

Overall Length

Search Overall Length

1-5/8 in
1-3/4 in
1-7/8 in
2 in
2-1/8 in
2-1/4 in
2-3/8 in
2-1/2 in
2-5/8 in
2-3/4 in
2-7/8 in
3 in
3-1/8 in
3-1/4 in
3-3/8 in
3-1/2 in
3-5/8 in
3-3/4 in
3-7/8 in
4 in
4-1/8 in
4-1/4 in
4-3/8 in
4-1/2 in
4-5/8 in
4-3/4 in
4-7/8 in
5 in
5-1/8 in
5-1/4 in
5-3/8 in
5-1/2 in
5-5/8 in
5-3/4 in
5-7/8 in
6 in

Primary Material Application

Cast Iron
Hi-Temp Alloy
Stainless Steel
Steel

Series

1500
1802
1891
2075
2075-TA
2075-TC
2075-TN
2213
3780
378TC
550
550ASP
550ASP-TN
55TA
55TN
Westward

Price

Min

Only digits are allowed. Maximum amount of digits: 6.

Max

Only digits are allowed. Maximum amount of digits: 6.

In Stock Now

Country of Origin: US

Cobalt Jobber-Length Drill Bits

Available115 products

Cobalt jobber-length drill bits tolerate higher drilling speeds and are harder and more wear-resistant than high-speed steel drill bits. They provide some shock absorption and can be used in handheld power tools. Jobber-length drill bits are the most commonly used drill-bit length. They provide a good balance of strength and accuracy when drilling into a variety of materials.

Series

Black-Oxide Finish Spiral-Flute Cobalt Jobber-Length Drill Bits

These drill bits have a black-oxide finish that retains lubricants to improve the bits' wear resistance and chip flow. Black-oxide bits should only be used for drilling ferrous metals. Spiral-flute drill bits evacuate chips as the bits drill into a workpiece.

Fractional Inch + 135 ° Drill Bit Point Angle + Split Point

Black-Oxide Finish Spiral-Flute Cobalt Jobber-Length Drill Bits Fractional Inch + 135 ° Drill Bit Point Angle + Split Point, sorted by Drill Bit Size, custom


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Letter + 135 ° Drill Bit Point Angle + Split Point

Black-Oxide Finish Spiral-Flute Cobalt Jobber-Length Drill Bits Letter + 135 ° Drill Bit Point Angle + Split Point, sorted by Drill Bit Size, custom


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Wire + 135 ° Drill Bit Point Angle + Split Point

Black-Oxide Finish Spiral-Flute Cobalt Jobber-Length Drill Bits Wire + 135 ° Drill Bit Point Angle + Split Point, sorted by Drill Bit Size, custom


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Note: Product availability is real-time basis and adjusted continuously. The product will be reserved for you when you complete your order.

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Black-Oxide Finish Spiral-Flute Cobalt Jobber-Length Drill Bits

Fractional Inch + 135 ° Drill Bit Point Angle + Split Point

Letter + 135 ° Drill Bit Point Angle + Split Point

Wire + 135 ° Drill Bit Point Angle + Split Point