Product Introduction
This micro adjustable precision boring system is a professional modular complete boring tool for CNC machining centers. The whole set covers precision boring from φ6 to φ51mm, with ultra-high 0.005mm micro adjustment accuracy. Equipped with gap-free eccentric stable structure, it features convenient tool setting, strong anti-vibration rigidity and excellent dimensional consistency.With lightweight universal connection structure, it perfectly adapts to precision finishing of deep holes, small-aperture and high-precision inner holes. It greatly simplifies tool changing and debugging process, improves overall CNC boring efficiency, and is widely used in mold manufacturing, auto parts, precision hardware and non-standard mechanical precision inner hole boring.

Main Technical Specification
| Model No. | Boring Range φ(Dmm) | Depth | Insert | Screws | Wrench | Net Weight |
|---|---|---|---|---|---|---|
| SBJ1606-24 | 6-9 | 24 | WBGT0601..L | MS-M2.0X5 | T6 | 0.08 |
| SBJ1608-32 | 8-11 | 32 | TBGT0601..L | 0.08 | ||
| SBJ1610-40 | 10-13 | 40 | 0.08 | |||
| SBJ1612-53 | 12-15 | 53 | 0.1 | |||
| SBJ1614-60 | 14-17 | 60 | TPGH0902..L | MS-M2.5X6 | 0.1 | |
| SBJ1616-68 | 16-21 | 68 | 0.12 | |||
| SBJ1620-83 | 20-26 | 83 | 0.2 | |||
| SBJ1625-90 | 25-31 | 90 | 0.3 | |||
| SBJ1630-90 | 30-36 | 90 | 0.32 | |||
| SBJ1635-90 | 35-41 | 90 | 0.32 | |||
| SBJ1640-90 | 40-46 | 90 | TPGH1103..L | MS-M3.0X8 | T8 | 0.38 |
| SBJ1645-90 | 45-51 | 90 | 0.38 | |||
| SBJ1620-150 | 20-26 | 150 | 0.45 | |||
| SBJ1625-150 | 25-31 | 150 | 0.45 | |||
| SBJ1630-150 | 30-36 | 150 | 0.45 | |||
| SBJ1640-150 | 40-46 | 150 | 0.45 |
| Model No. | Boring Range φ(Dmm) | Combined System-Spindle Shank Specification | L1 | Net Weight |
|---|---|---|---|---|
| NT30-NBJ16-12PCS | 6-51 | NT40-H63-55 | 55 | 9.3 |
| NT40-NBJ16-12PCS | 6-51 | NT40-H63-55 | 55 | 9.3 |
| NT50-NBJ16-12PCS | 6-51 | NT50-H63-65 | 65 | 11.2 |
| BT30-NBJ16-12PCS | 6-51 | BT30-H63-65 | 65 | 8.5 |
| BT40-NBJ16-12PCS | 6-51 | BT40-H63-55 | 55 | 9.1 |
| BT50-NBJ16-12PCS | 6-51 | BT50-H63-65 | 65 | 11.7 |
| SK40-NBJ16-12PCS | 6-51 | SK40-H63-60 | 60 | 9.1 |
| SK50-NBJ16-12PCS | 6-51 | SK50-H463-65 | 65 | 10.9 |
| HSK63-NBJ16-12PCS | 6-51 | HSK63-H63-67 | 67 | 9 |
| MTA-NBJ16-12PCS | 6-51 | SK40-H63-60 | 60 | 0.42 |
| MTA5-NBJ16-12PCS | 6-51 | SK50-H63-65 | 65 | 0.42 |
| MTA-NBJ16-12PCS | 6-51 | HSK63-H63-67 | 67 | 0.42 |

Main Technical Specification
Ultra-High Precision Gap-Free Adjustment Structure
Exclusive eccentric fine adjustment design, zero rotational clearance and no jamming, keeps stable hole size for long-term use, with top-level boring accuracy and smooth operation.
Fast & User-Friendly Tool Setting System
Scale slide rail rough positioning structure realizes quick one-key tool setting, easy for new operators, and greatly shortens machine debugging time.
High Rigidity Anti-Vibration Locking Structure
Over-position precise locking for boring bars and closely fitted flange fit, no tool chatter in long-overhang machining. Effectively eliminates surface chatter marks and ensures high workpiece finish.
Full Working Condition Universal Adaptability
Whole set covers ultra-wide φ6-φ51mm aperture range, compatible with tungsten steel deep hole boring bars. Lightweight body reduces spindle load, universal for small and large holes, and greatly improves overall processing efficiency.
Industrial Applications
Competitive advantage
Mold Precision Cavity Processing
High-precision boring for mold inserts, small mold cavities and deep small holes
01
Auto Precision Parts Processing
Precision tolerance finishing for small shaft sleeves, hydraulic valve bodies and micro coaxial holes
02
Universal CNC Precision Finishing
Small hole and precision fitting inner hole boring for CNC machining centers and lathes
03
Non-Standard Hardware Parts Processing
High-precision inner hole machining for small hardware, shaft sleeves and thin-wall parts
04
Medical Device Precision Components
High-finish slender hole and micro-tolerance precision boring for medical parts
05
FAQ
Q: Q1: Why do traditional small-hole boring tools cause dimensional drift and out-of-tolerance batch processing?
A: A1: Old boring heads have structural gaps and insufficient adjustment accuracy for tiny holes. Dimensional deviation becomes serious after long-time cutting, resulting in poor batch consistency and high scrap rate.
Q: Q2: Why chatter marks and unqualified finish often happen in small-diameter deep hole machining?
A: A2: Small boring bars have low rigidity and loose locking structure. Severe resonance occurs in high-speed cutting, which cannot suppress vibration, leading to unqualified hole surface precision.
Q: Q3: Why ordinary small-hole boring tools have narrow range and frequent tool changes delay production?
A: A3: Conventional tools have extremely limited single aperture range. Small and micro holes need separate tools, frequent disassembly and re-setting waste plenty of effective processing time. Q4: Why traditional fine boring tools have complicated adjustment and large manual errors?
Q: Q4: Why traditional fine boring tools have complicated adjustment and large manual errors?
A: A4: Without convenient rough adjustment, old tools have complex micro adjustment steps with high operation errors. Tool setting takes long time, hard to control precise tolerance of small holes stably.
Q: Q5: Why ordinary boring tools cannot finish high-precision slender small deep hole machining?
A: A5: They cannot match extended thin tungsten steel boring bars. Insufficient rigidity causes tool deviation and breakage, failing to guarantee coaxiality and accuracy of deep small holes.
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