LBS Catalog

Combined Drill & Countersink (Center Drill)

High Speed Steel Bright

Packaging: All sizes are individually packaged.

Series 3500

Plain Type/60ª Angle

When metal parts are machined on centers, as in turning or cylindrical grinding, it is always necessary to drill and countersink the center holes to serve as seats or bearings in the machine centers. Plain Type is the most commonly used combined drill & countersink.

Cutting Tools

3500

Overall Length 1-1/4”

Overall Length 2-1/8 2-3/4

3500 Item No. 16599 16608 16609 16600 16601 16602

400N Item No. 16603 16604 16605 16606 16607

Body Dia.

Drill Size

Body Dia. 5/16 7/16

Drill Size

Size

Size

000

1/8”

.020 .025

4 5 6 7 8

1/8”

00

1/8 1/8 1/8

1-1/4 1-1/4 1-1/4 1-7/8

3/16” 7/32”

0 1 2 3

1/32” 3/34” 5/64” 7/64”

1/2 5/8 3/4

3

3-1/4 3-1/2

1/4”

3/16

5/16”

1/4

2

Series 3500E

60° When metal parts are machined on centers, as in turning or cylindrical grinding, it is always necessary to drill and countersink the center holes to serve as seats or bearings in the machine centers. Plain Type is the most commonly used combined drill & countersink. Bell type is used if the parts to be machined are to pass through a number of subsequent handlings where there is danger of marring the edges of the center holes. They have an additional small 120º chamfer to protect the edges of the 60º hole.

3500E Plain

3500E Bell Type

Body Dia.

Overall Length 1-1/4 1-7/8

Body Dia.

Overall Length 1-1/4” 1-7/8”

Drill Size

Bell Item No. 10498 10503 10509 10516 10522 10528 10533 10538

Plain Item No.

Drill Size

Size

Size

Assortments A-12 Fasteners F-72

11 12 13 14 15 16 17 18

1/8”

3/64” 1/16” 3/32” 7/64” 5/32” 3/16” 7/32”

1 2 3 4 5 6 7 8

1/8”

3/64” 5/64” 7/64”

10407 10414 10425 10436 10446 10457 10467 10477

3/16”

3/16”

Cutting Tools C-325

1/4”

2

1/4”

2”

5/16” 7/16”

2-1/8 2-3/4

5/16” 7/16”

2-1/8” 2-3/4”

1/8”

Pipe Fittings P-541 Electrical E-704 Hydraulics H-745

3/16” 7/32”

1/2” 5/8” 3/4”

3

1/2” 5/8” 3/4”

3”

3-1/4 3-1/2

3-1/4” 3-1/2”

1/4”

1/4”

5/16”

Abrasives AB-782 MRO M-833

Tel: (225) 272-6200 Fax: (225) 272-7001

sales@lbsbr.com www.lightningboltandsupply.com

C-419