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LT Threading – Toolholder Identification System

straight shankoffset shankC–qualified back and end, 5" longD–qualified back and end, 6" longE–qualified back and end, 7" longT–qualified back and end,3.250" longQ – qualified metric holder

METRICINCH

Lathe Tooling Catalog 4010 - 7354 L S AS R

2525K

16 16 3 D

6. Shank Size 2. Insert HoldingMethod3.Tool Style5. Drop Head8. Qualified Surfaceand Length7. Insert Size 1.Insert Style4.Hand of Tool

lefthandrighthand metric:
TECHNICALDATATOPNOTCHLT Shank height and width in mm and holder length according toISO standard This position will show a significant two-digit number that indicates the holder cross section. For shanks 5/8" square and over, the number will represent the number of sixteenths of width and height.For shanks under 5/8" square,the number of sixteenths of cross section will be preceded by a zero. For rectangular holders, the first digit LI(mm) inch: 11,016,522,0 Size equals number of 1/8-inchincrements of IC. L = laydown triangle S = insert screw orclamp only metricinsertsize 11 16 22 D(inch)
THREADING TOOLS inchinsertsize 1/43/8 1/2 or insert screw. Do not use both. 2 34 represents the number of eighths of width,and the second digit thenumber of quarters of height, except for a toolholder 1 1/4" x 1 1/2", which is given the number 91.

LT Threading – Shim Identification System

2P– 2°positive1P– 1°positive__– 0°neutral1N– 1°negative 2N– 2°negative 3N– 3°negative D value in 1/8ths inch *NOTE: Toolholders with primary shank sizes larger than 1/2-inch or 12 mm are supplied with clamp and insert screw. Secure the insert with either the clamp

1.Shim4.InsertSize5. ShimAngle2. Y – Shimfor LTStandardInserts 3. E – ExternalI – Internal

SM Y E 3 2P

NOTE: For shims and shim kits, see page C61 - C63

C23