Boring Bar Identification

  • SEC-Boring Bar Identification (Round Shanks) [ISO Standard]
(Example) S 16 RSTUPR 11 03 - 18

① Shank ⑨ Insert cutting ⑪ Minimum

③ Shank length ⑤ Insert shape ⑦ Relief angle

material edge length bore diameter

Chart 1 Chart 3 Chart 5 Chart 7 mm mm

② Shank④ Clamping⑩ Insert
⑥ Holder style⑧ Feed direction
diametersystemthickness
mmChart 4Chart 6Chart 8mm
* These symbols may be omitted depending on the product.

(Chart 1) (Chart 3) (Chart 4)

① Shank material ③ Shank length ④ Clamping system

S Steel shank Symbol Length (mm) Symbol Length (mm) Symbol Length (mm) Symbol Clamp type Mechanism example Symbol Clamp type Mechanism example

ASteel shank with oil holeF80M150T300
BSteel shank with vibrationG90N160U350Top Clamp

control mechanism C Top Clamp M +

DSteel shank with oil hole andH100P170V400
vibration control mechanismPin Lock
CCarbide shankJ110Q180W450
EECarbide shank with oil holeK125R200
L140S250Lever Lock
DDouble ClampP(Two-side
(Chart 8)constrained)
⑧ Feed direction

Symbol Right hand Symbol Left hand

E + Pin Lock S

Screw Lock (supported by 1 lathe) R L

(Chart 5) (Chart 6) (Chart 7)

⑤ Insert shape ⑥ Holder style (The part marked with -- indicates the main cutting edge) ⑦ Relief angle

SymbolInsert shapeSymbolInsert shape SymbolShapeOffset SymbolShapeOffsetSymbolRelief angle
AParallelogramMDiamondANA3
85°86°NoNo
85 angle86 angle90°63°
BParallelogramOBQB
82°OctagonalNo107.5°Yes5
82 angle75°
CDiamondPDRC7
80°PentagonalNoYes
80 angle45°75°
DDiamondRESD15
55°RoundNoYes
55 angle60°45°
EDiamondSFTE
75°Square90°YesYes20
75 angle60°
FDiamondTGUF
50°TriangleYes93°Yes25
50 angle90°
HVDiamondJWG30
Hexagonal35°Yes60°Yes
35 angle93°
KParallelogramWKYN0
55°Trigon80°75°Yes85°Yes
55 angle
LRectangularL95°YesZYesP11

93° O Special relief angle

  • SEC-Boring Bar Identification (Round Shanks) [Sumitomo Standard]

( ) ( )

(Example) WB P T 2 12 R H 14

With oil hole Minimum bore BB Steel shank boring bar diameter WB Carbide boring bar

XB Steel shank boring bar with anti-vibration control mechanism

SymbolRL
Feed directionRightLeft
PPositive Inserts
Symbol081012162025
Shank diameter (mm)81012162025
SymbolTSC
Insert shapeTriangleSquare80 diamond type
Symbol562034
Insert inscribed circle (mm)3.974.766.357.949.52512.70