BENEFITS OF BIG-PLUS
High Spindle Speeds At high speeds, spindle expansion from heat and centrifugal force can pull standard tool holders inward. BIG-PLUS holders prevent this by contacting the spindle face, minimizing Z-axis projection variation (variation due to heat exists).
Z-Axial Movement During Rotation (Ex: CV40)
60 50 40 30 20 10
BIG-PLUS CONVENTIONAL
BIG-PLUS
Effect by Thermal Deformation is Included
.0008"
20,000 RPM
0
0
1
5
10
15
20
25
30
CONVENTIONAL
Spindle Speed (x1,000 RPM)
A Vertical Machine was Used in the Test
Improved ATC Repeatability Dual contact precisely positions the tool holder within 1 micron, ensuring highly repeatable accuracy during ATC tool changes.
ATC Repeatability
Machine: Horizontal (4 years old)
6"
ISO40
10 8 6 4 2 0
WITHIN 1 μm
Taper Contact (Conventional) Dual Contact (BIG-PLUS)
Test Bar (Zero Runout)
Pulling Force 800kg
12345678910 No. of Times of ATC
Perfect Interchangeability BIG-PLUS tool holders work with standard spindles, and standard holders can be used in BIG-PLUS spindles (without dual contact). Unlike other systems, BIG-PLUS requires no new accessories or machine modifications, as it’s based on a conventional steep taper.
BIG-PLUS Spindle + BIG-PLUS Holder CONTACT
Conventional Spindle BIG-PLUS Holder CLEARANCE +
Existing Accessories Utilized
Tool Presetter
BIG-PLUS Holder
Tooling Fixture
Conventional Holder
Tool Storage System
5
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