BIG-PLUS Licensed vs Unlicensed

THE BIG-PLUS SPINDLE SYSTEM IS AN ORIGINAL DEVELOPMENT OF BIG DAISHOWA SEIKI CO., LTD.

Condition #1 Proper Fit

Condition #2 Flange Contact Only Limited or No Taper Contact • Poor runout accuracy • Severe chatter and vibration • Spindle damage Condition #3 Taper Contact Only No Flange Contact • Features of BIG-PLUS are voided • Works same as taper-only contact tooling

R

• Dual contact of taper and flange face after clamping

STANDARD

Elastic Deformation

Gap

Inspection Results of Sample Non-Licensed Dual Contact Tooling 25 Samples — 40 & 50 Taper “Dual Contact” Measured According to the BIG-PLUS Standard

40%— Flange contact only, not to specification

16%— Allowable tolerance

44%— Taper contact only, not to specification

Condition #2 Flange Contact Only Limited or no taper contact

Condition #1 Proper Fit Taper & Flange Contact Allowable tolerance range for BIG-PLUS

Condition #3 Taper Contact Only No flange contact

3

Powered by