L8nm05 Metal Bond CBN Stones, Borazon Honing Stones
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Product Highlights
- Premium GE Abrasives: Uses high-quality diamond and CBN abrasives from GE Diamond Innovation for superior performance.
- Versatile Material Support: Effective for hardened steels, cast iron, aluminum, titanium, ceramics, and other exotic materials.
- 20+ Years Expertise: Backed by over two decades of R&D, production, and sales experience in honing tools.
- Multiple Bond Options: Available in Metal Bonded configurations with diverse grit sizes for specific application needs.
- Complex Bore Capability: Suitable for open, blind, bowed, and interrupted holes with keyways or splines.
- High Efficiency Finish: Delivers excellent surface roughness and accelerated stock removal in various industrial applications.
- Wide Diameter Range: Covers diameter ranges from 6.22mm to 7.82mm with precise K8 and BL8 mandrel compatibility.
Product Attributes
- Customization
- Available
- Type
- Standard Oilstone
- Material
- CBN or Diamond Abrasives
- Model NO.
- L8NM55
- Application
- Bore Honing and Finishing
- Effect
- Bore Honing
- Abrasives
- CBN or Diamond (Dm or Nm)
- Bond
- Metal Bonded
- Grit Size
- Dm55, Dm85, Dm05, Nm55, Nm85, Nm05
- Stone Length
- 57mm
- Transport Package
- Carton Box
- Specification
- L8NM55 L8DM55
- Trademark
- BOSON ABRASIVES
- Origin
- China
- HS Code
- 6804219000
- Production Capacity
- 8000 PCS. / Month
- Package Size
- 8.00cm * 2.00cm * 2.00cm
- Package Gross Weight
- 0.200kg
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of L8nm05 Metal Bond CBN Stones, Borazon Honing Stones
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Product Description
BOSON Abrasives specializes in the manufacturing of metal-bonded diamond and CBN honing stones (honing sticks). We use high-quality diamond and CBN abrasives from Diamond Innovations (formerly GE Superabrasives) to provide consistent abrasive performance and reliable honing results.
With over 20 years of experience in the R&D, manufacturing, and sales of honing products, BOSON Abrasives offers a comprehensive range of solutions, including honing stones, honing tools, honing machines, and professional honing services.
Our extensive experience in superabrasive formulations, manufacturing processes, and honing applications enables us to develop honing stones with excellent cutting efficiency, long service life, and consistent surface finishing across a wide range of materials.
Honing Stone Types
We offer honing stones in a wide range of grit sizes and metal-bond configurations, suitable for honing various materials, including hardened tool steels, alloy steels, aluminum, titanium, bronze, brass, cast iron, stainless steel, ceramics, and other advanced materials.
Diamond (DM) - Metal Bond
Excellent for high-efficiency stock removal and long abrasive life when honing cast iron, carbide, titanium, silicon carbide, ceramics, glass, graphite, and other difficult-to-machine materials.
CBN (NM) - Metal Bond
Excellent for high-efficiency stock removal and long abrasive life when honing ferrous materials, including alloy steel, hardened steel, quenched and tempered steel, mild steel, and other steel alloys.
Honing Tools for Existing Equipment
BOSON also manufactures a wide range of honing mandrels, adapters, honing heads, and other honing tools for various honing applications.
Our honing tools can be used with SUNNEN® honing machines and other commonly used honing equipment, providing a cost-effective solution for existing honing applications.
Simply provide the model or reference code of your current honing tool, and our technical team can recommend a suitable BOSON solution.
SUNNEN® is a registered trademark of its respective owner. BOSON Abrasives is an independent manufacturer and is not affiliated with or endorsed by SUNNEN®.
Bore types:
Open holes with no interruptions
Open holes with keyways or splines,
Open holes with tandem lands,
Blind holes,
Bowed Hole,
Hole with counterbore or overhang.
The following bore errors can be correct by honing:
Application:
Cylinder liner & sleeves, engine block, connecting rod, rocker arms, refrigerator compressors & components, brake drums, fuel injectors, gun barrels, gears, hydraulics etc.

K8 / BL8 Honing Units, Diameter Range: 6.22mm - 7.82mm / .245" - .308"
| Diameter Range mm | Diameter Range Inches | K8 Mandrel | BL8 Mandrel | Adapter | Alignment Bushing | Truing Sleeve | Honing Stone |
| 6,22-6,35 | .245-.250 | K8-245A | BL8-245A | K8-A/BL8-A | C-245 | S-245 | K8DM35 / L8DM35 |
| 6,35-6,48 | .250-.255 | K8-250A | BL8-250A | K8-A/BL8-A | C-250 | S-250 | K8DM45 / L8DM45 |
| 6,48-6,60 | .255-.260 | K8-255A | BL8-255A | K8-A/BL8-A | C-255 | S-255 | K8DM55 / L8DM55 |
| 6,60-6,73 | .260-.265 | K8-260A | BL8-260A | K8-A/BL8-A | C-260 | S-260 | K8DM085 / L8DM85 |
| 6,73-6,86 | .265-.270 | K8-265A | BL8-265A | K8-A/BL8-A | C-265 | S-265 | K8DM05 / L8DM05 |
| 6,86-6,98 | .270-.275 | K8-270A | BL8-270A | K8-A/BL8-A | C-270 | S-270 | K8DM005 / L8DM005 |
| 6,98-7,11 | .275-.280 | K8-275A | BL8-275A | K8-A/BL8-A | C-275 | S-275 | K8NM35 / L8NM35 |
| 7,11-7,24 | .280-.285 | K8-280A | BL8-280A | K8-A/BL8-A | C-280 | S-280 | K8NM45 / L8NM45 |
| 7,24-7,37 | .285-.290 | K8-285A | BL8-285A | K8-A/BL8-A | C-285 | S-285 | K8NM55 / L8NM55 |
| 7,37-7,49 | .290-.295 | K8-290A | BL8-290A | K8-A/BL8-A | C-290 | S-290 | K8NM85 / L8NM85 |
| 7,49-7,62 | .295-.300 | K8-295A | BL8-295A | K8-A/BL8-A | C-295 | S-295 | K8NM05 / L8NM05 |
| 7,62-7,82 | .300-.308 | K8-300A | BL8-300A | K8-A/BL8-A | C-300 | S-300 | K8NM005 / L8NM005 |
Standard Honing Mandrels, CBN and Diamond Stones, Adapters






About the Supplier
This supplier has been audited by SGS. Verify the report on the official SGS website with ID "QIP-ASR2391261". Items marked "" are certified.
Company Profile
Boson Abrasives was founded in 2013, our technical engineers, sales team have more than 20 years of experience in honing and grinding industry. We dedicated to provide honing and grinding solutions for automotive, motorcycle, air conditioning and refrigerator compressors, gears, bearings, hydraulics, electronic, aerospace, mold & tools industries, etc...
We are committed to research, development and manufacturing of high quality of diamond and CBN honing stones, honing tools, honing head, single pass honing tools, diamond grinding wheels, CBN grinding wheels, diamond cutting wheels, diamond dressing tools.
Honing tools are our main products. With many years of R&D and production, we have developed special metal bonding technology for different application. Boson Abrasives only use the world highest quality of diamond and CBN abrasives from GE ( Diamond Innovation) to ensure the high quality of honing abrasives. Our honing stones ( abrasive sticks) shows high cutting ability with good wear resistance, stable quality.
Honing tools products incl. CBN and diamond honing stones, honing abrasives, single stone honing tools, multi-stone honing tools, high precision double feed honing head for engine blocks, GHSS hone head for engine rebuilding, single pass honing tools. Most of our honing tools are tailer made for specific application. Boson honing tools are fit for Sunnen, Gehring, Nagel, Nissin, FUJI, Toyo, Kadia, Engis, Delapena and many other honing machines.
We export products with customers in over 30 countries incl. USA, Canada, Germany, France, Italy, United Kingdom, Russia, Ukraine, India, Turkey, Thailand, Singapore, etc.
Our Vision
Boson Abrasives is committed to providing quality of honing, grinding and related products and custom engineered solutions in a way that exceeds the expectations of our customers.
About Our Factory & Business Background
- Address
- No.55 Hanghai East Road, Guancheng District, Zhengzhou, Henan, China
- Terms of Payment
- T/T, PayPal
- International Commercial Terms(Incoterms)
- FOB, CFR, CIF, CPT, EXW, FCA, CIP
- Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays - Nearest Port
- Beijing, Guangzhou, Zhengzhou
Our Production Capability & Technical Expertise
Our Industry Experience & Global Business Record
- Export Year
- 2013-03-15
- Main Markets
- North America, South America, Eastern Europe, Southeast Asia, Oceania, Mid East, Eastern Asia, Western Europe
FAQ
- What abrasives are used in these honing stones?
- We exclusively use high-quality diamond and CBN abrasives sourced from GE (Diamond Innovation) to ensure the highest quality.
- Which materials can these honing stones process?
- They are suitable for hardened tool steels, alloy steels, aluminum, titanium, bronze, brass, cast iron, stainless steel, and ceramics.
- Are these stones compatible with Sunnen machines?
- Yes, they are designed as Sunnen alternatives and are compatible with K8/BL8 Honing Units and standard mandrels.
- What types of holes can be honed with these stones?
- They handle open holes, blind holes, bowed holes, and holes with interruptions like keyways, splines, or tandem lands.
- What is the available diameter range?
- The diameter range covers 6.22mm to 7.82mm (.245' - .308'), with specific grits for each sub-range.
- What bond types are available?
- The stones are available in Metal Bonded configurations with various grit sizes such as Dm55, Dm85, Dm05, Nm55, etc.
- What are the lead times for orders?
- The average lead time is within 15 workdays for both peak and off-season periods.
- What payment terms are accepted?
- We accept T/T and PayPal for payment terms.
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