Products Description
Tool Holders & Boring Bars BST matched with LBK high-precision precision connecting shanks are full sets of CNC anti-vibration tool holders and deep hole boring bars specially for machining centers. Forged from high-strength rigid alloy, it features excellent vibration resistance, standard modular universal interface, convenient assembly and flexible extension splicing, with ultra-high coaxiality and stable locking performance.Widely compatible with NBH micro-adjustment fine boring heads, it applies to precision small holes, long overhang deep holes and large aperture CNC boring processing. It effectively eliminates cutting chatter marks, improves high surface finish, controls precise micron hole tolerance and greatly improves CNC boring efficiency. Wear-resistant, durable and stable in batch mass production, it is ideal Tool Holders & Boring Bars for mold industry, auto hydraulic parts, engineering machinery and non-standard precision CNC inner hole machining.
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Features
Technical Features
High Rigidity Anti-Vibration Tool Body Structure
Special BST anti-vibration boring bars have excellent bending and vibration resistance. Stable cutting without chatter marks in long-overhang machining.
Standard Precision Universal Connection Interface
LBK high-precision shank with tiny fit clearance, firm locking and ultra-high coaxial accuracy.
Flexible Modular Extension Design
Free splicing and lengthening in multiple specifications, adapts to holes of different depths without frequent tool replacement.
Wide Compatibility With Boring Heads
Perfectly matches all NBH micro boring heads, widely suitable for most CNC machining center boring conditions.
Application Fields
Applicable Processing Conditions
Mold Deep Cavity Boring Processing
Anti-vibration precision boring for slender deep holes and mold cavities
Hydraulic Valve Body Hole Processing
Long-stroke high-precision anti-vibration boring for valve inner holes
Universal CNC Machining Center Boring
Matching tool holders and boring bars processing for various CNC machine holes
Auto Parts Deep Hole Processing
Anti-vibration finishing for slender deep holes of shafts and valve parts
Main Technical Parameters
| Type | Fig. |
L(mm) Length |
D(mm) External Diameter |
Applicable Boring Heads | kg Weight |
|---|---|---|---|---|---|
| BT30-LBK1-070L | 1 | 70 | 19 | CBH20, MBH20 | 0.5 |
| BT30-LBK1-080L | 1 | 80 | 19 | RBH20(LA), CBH20, MBH20, 25 | 0.6 |
| BT30-LBK2-080L | 2 | 80 | 31 | RBH25(LA), CBH25, MBH25 | 0.7 |
| BT30-LBK2-095L | 2 | 95 | 31 | RBH25(LA), CBH25, MBH25, CBH4 | 0.8 |
| BT30-LBK2-090L | 2 | 90 | 50 | RBH40(LA), CBH40, H4, MH12, CBH5 | 1.0 |
| BT30-LBK2-095LA | 2 | 95 | 64 | RBH60(LA), RBH80(LA), CBH10, 100, 150, MBH16, CBH5 | 1.0 |
| BT40-LBK1-075L | 1 | 75 | 19 | CBH20, MBH20 | 1.0 |
| BT40-LBK1-085L | 1 | 85 | 19 | RBH20(LA), CBH20, MBH20, 25 | 1.1 |
| BT40-LBK1-095L | 1 | 95 | 19 | RBH20(LA), CBH20, MBH20, 25 | 1.2 |
| BT40-LBK1-115L | 1 | 115 | 19 | RBH20(LA), CBH20, MBH20, 25 | 1.3 |
| BT40-LBK2-095L | 2 | 95 | 31 | RBH25(LA), CBH25, MH32 | 1.3 |
| BT40-LBK2-115L | 2 | 115 | 31 | RBH25(LA), CBH25, MH32 | 1.5 |
| BT40-LBK2-090L | 2 | 90 | 50 | RBH40(LA), CBH40, H4, MH12, CBH5 | 1.3 |
| BT40-LBK2-115LA | 2 | 115 | 50 | RBH40(LA), CBH40, H4, MH12, CBH5 | 1.5 |
| BT40-LBK2-175L | 2 | 175 | 50 | RBH40(LA), CBH40, MH45, CBH5 | 2.2 |
| BT40-LBK2-075L | 2 | 75 | 64 | RBH60(LA), CBH60, MH62, CBH5 | 2.3 |
| BT40-LBK2-115L | 2 | 115 | 64 | RBH60(LA), CBH60, MH62, CBH5 | 2.6 |
| BT40-LBK2-175L | 2 | 175 | 64 | RBH60(LA), CBH60, MH62, CBH5 | 3.2 |
| BT40-LBK2-095L | 2 | 95 | 64 | RBH80(LA), RBH90(LA), CBH10, 100, 150, MBH16, CBH5 | 3.3 |
| BT40-LBK2-165L | 2 | 165 | 64 | RBH80(LA), RBH90(LA), CBH10, 100, 150, MBH16, CBH5 | 3.7 |
| BT40-LBK2-185L | 2 | 185 | 64 | RBH80(LA), RBH90(LA), CBH10, 100, 150, MBH16, CBH5 | 4.0 |
| BT50-LBK1-115L | 1 | 115 | ø31(1.20) / ø19 | CBH20 | 2.7 |
| BT50-LBK1-145L | 1 | 145 | ø31(1.20) / ø19 | CBH20 | 3.1 |
| BT50-LBK1-165L | 1 | 165 | ø31(1.20) / ø19 | CBH20 | 3.5 |
| BT50-LBK1-140L | 1 | 140 | 24 | RBH25(LA), CBH25, MBH16, 25 | 4.0 |
| BT50-LBK1-155L | 1 | 155 | 24 | RBH25(LA), CBH25, MBH16, 25 | 4.1 |
| BT50-LBK1-185L | 1 | 185 | 24 | RBH25(LA), CBH25, MH32 | 4.2 |
| BT50-LBK1-115L | 1 | 115 | 31 | RBH25(LA), CBH25, MH32 | 4.3 |
| BT50-LBK2-145L | 2 | 145 | 39 | RBH40(LA), CBH40, MH45, CBH4 | 4.6 |
| BT50-LBK2-155L | 2 | 155 | 39 | RBH40(LA), CBH40, MH45, CBH4 | 4.7 |
| BT50-LBK2-205L | 2 | 205 | 39 | RBH40(LA), CBH40, MH45, CBH4 | 4.9 |
| BT50-LBK2-155L | 2 | 155 | 50 | RBH60(LA), CBH60, MH62, CBH5 | 4.8 |
| BT50-LBK2-185L | 2 | 185 | 50 | RBH60(LA), CBH60, MH62, CBH5 | 5.2 |
| BT50-LBK2-240L | 2 | 240 | 50 | RBH60(LA), CBH60, MH62, CBH5 | 6.2 |
| BT50-LBK2-240L | 2 | 240 | 64 | RBH80(LA), RBH90(LA), CBH10, 100, 150, MBH16, CBH5 | 6.5 |
| BT50-LBK2-095L | 2 | 95 | ø64(2.60) / ø50 | RBH80(LA), RBH90(LA), CBH10, 100, 150, MBH16, CBH5 | 7.0 |
| BT50-LBK2-230L | 2 | 230 | 64 | RBH80(LA), RBH90(LA), CBH10, 100, 150, MBH16, CBH5 | 7.5 |
| BT50-LBK2-230L | 2 | 230 | 64 | RBH80(LA), RBH90(LA), CBH10, 100, 150, MBH16, CBH5 | 7.6 |
| BT50-LBK2-350L | 2 | 350 | ø100(3.94) / ø64 | RBH120(LA), RBH160(LA), CBH10, 300, 400 | 13.6 |
| BST-LBK2-070L | 2 | 70 | 95 | RBH120(LA), RBH160(LA), CBH10, 300, 400 | 3.2 |
| BST-LBK2-110L | 2 | 110 | 95 | RBH120(LA), RBH160(LA), CBH10, 300, 400 | 5.1 |
| BST-LBK2-130L | 2 | 130 | 95 | RBH120(LA), RBH160(LA), CBH10, 300, 400 | 6.6 |
| BST-LBK2-190L | 2 | 190 | 95 | RBH120(LA), RBH160(LA), CBH10, 300, 400 | 8.1 |
| BST-LBK2-250L | 2 | 250 | 95 | RBH120(LA), RBH160(LA), CBH10, 300, 400 | 9.6 |
| IBT50-LBK3-070L | 3 | 70 | 64 | CBH10, 100, 150 | 3.1 |
| IBT50-LBK3-110L | 3 | 110 | 64 | CBH10, 100, 150 | 5.1 |
| IBT50-LBK3-150L | 3 | 150 | 64 | CBH10, 100, 150 | 6.6 |
| IBT50-LBK3-200L | 3 | 200 | 64 | CBH10, 100, 150 | 8.1 |
| IBT50-LBK3-250L | 3 | 250 | 64 | CBH10, 100, 150 | 9.6 |
| IBT50-LBK3-300L | 3 | 300 | 64 | CBH10, 100, 150 | 11.2 |
| IBT50-LBK3-350L | 3 | 350 | 64 | CBH10, 100, 150 | 12.7 |
| IBT50-LBK3-400L | 3 | 400 | 64 | CBH10, 100, 150 | 14.2 |
| BT50-FM447-075L | - | 75 | 128 | RBH120(LA), RBH160(LA), CBH10, 300, 400 | 7.0 |
Products Description
Q: Q1: Why do ordinary Tool Holders & Boring Bars vibrate easily and produce chatter marks in long-overhang machining?
A: A1: Ordinary bars lack rigidity and anti-vibration performance. High-speed long-distance cutting causes resonance, resulting in rough hole surface and out-of-tolerance accuracy.
Q: Q2: Why non-standard shanks have poor compatibility with various boring heads?
A: A2: Large interface tolerance and poor coaxiality cause locking deviation, unable to match NBH micro boring heads universally.
Q: Q3: Why old boring bars cannot be extended and have limited deep hole processing ability?
A: A3: No modular splicing function, unable to process deep cavities and long holes, with narrow working range.
Q: Q4: Why large fit clearance causes dimensional drift in batch production?
A: A4: Loose shank fit leads to displacement under cutting force, poor batch hole consistency and high scrap rate.
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