Page 351 - Master Catalog 2017, Inch

Small Hole Boring Bars
Catalog Numbering System

By referencing this easy-to-use guide, you can
identify the correct product to meet your needs.

CSBI180187257R

180 187 25 7 R

Head Diameter Shank Diameter Length/Depth Lead Angle* Hand of Tool
shown as “D2” shown as “D” shown as “L1/L4”

Inch Inch R = Right hand
Bore Length for Step Bars 0 = 0°
165 = .166" 156 = .156" Used for L = Left hand
Thread Depth for Threading Bars
180 = .180"/.189" 187 = .187"/.188" Threading/
Overall Length for Straight Grooving Bars
203 = .203"/.207"/ 250 = .250" Shank Bars Right-hand boring bar
.210"
312 = .312"/.313" 3 =3°
250 = .260"/.258" 375 = .375" Inch Metric 5 =5° R
312 = .313"/.321"/ 500 = .500" 1 = 1.000" 12 = 12,70mm 7 =7°
322"/.323"
625 = .625" 1125 = 1.125" 19 = 19,05mm 225 = 22.5˚
322 = .322" 750 = .750" 125 = 1.250" 22 = 22,23mm 30 = 30°
375 = .375"/.385"/ 875 = .875" 15 = 1.500" 25 = 25,40mm 45 = 45°
.390"
1000 = 1.000" 1875 = 1.875" 32 = 31,75mm 60 = 60°
500 = .510" 1250 = 1.250" 2 = 2.000" 38 = 38,10mm
25 = 2.500" 48 = 47,63mm
Metric Metric 3125 = 3.125" 51 = 50,80mm
7 = 6,60mm 4 = 4,00mm 35 = 3.500" 63 = 63,50mm
8 = 8,18mm/8,20mm 5 = 5,00mm 4 = 4.000" 64 = 64,00mm Left-hand boring bar
10 = 9,78mm 6 = 6,00mm 45 = 4.500" 76 = 76,00mm
13 = 12,70mm/12,95mm 8 = 8,00mm 5 = .500"/ 79 = 79,38mm L
5.000"
45 = 4,57mm 10 = 10,00mm 100 = 100,58mm/
101,50mm/
48 = 4,80mm 12 = 12,00mm 6 = 6.000" 101,60mm
52 = 5,16mm 16 = 16,00mm 7 = 7.000"/
53 = 5,30mm 7.085" 102 = 101,60mm
64 = 6,60mm 75 = .750" 127 = 127,00mm
66 = 6,55mm/6,60mm 8 = 8.000" 152 = 152,00mm
152,40mm
82 = 8,15mm 90 = .900"
95 = 9,50mm 10 = 10.000" 178 = 177,80mm
179,90mm
99 = 9,91mm 12 = 12.000"
159 = 15,88mm 203 = 203,20mm
254 = 254,00mm

Head
Diameter

Shank
Diameter

* NOTE: Shown as “KRI” for metric bars
NOTE: Only shown on stepped-style bars. and “KRA” for inch bars .

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