An automotive workshop in Mumbai needs to hone engine cylinders quickly and accurately.
Using the Flex-Hone GBD31212, the workshop achieves a smooth plateau finish, reduces honing time, and improves seal longevity, arriving in 11-13 days.
You save 4,850 (33%)
33% off the seller list price
Estimated doorstep delivery by 11 Nov - 13 Nov from USA






Achieve Precision Finishing at Cost-Effective Rates
Flex-Hone GBD31212 is a high-quality abrasive tool imported from the USA, designed for precise honing of cylinders in automotive and industrial applications. Its 3.5 inch (89mm) diameter and 120 grit silicon carbide abrasive ensure a smooth, crosshatch finish, reducing sealing issues and improving oil control.
The flexible bead-style abrasive globules are bonded to nylon filaments, making the tool self-centering and easy to use in various rotating spindles, from hand drills to CNC machines. Its engineered oversize creates optimal pressure, ensuring uniform wear and consistent results. Reviewers in India report excellent finish quality on mild steel and cast iron, with faster ring seating and better seal longevity.
Imported directly from the USA, the Flex-Hone GBD31212 offers reliable quality and performance. It arrives in 11-13 days, with all duties included, making it a cost-effective choice for professional workshops and OEMs seeking a durable, high-performance honing solution in India.
Superior Finish & Rapid Ring Seating
Brush Research's FLEX-HONE® technology produces a consistent plateau finish, reducing sealing and oil seepage issues. Its abrasive beads are bonded for durability, enabling faster, cleaner honing with minimal setup.
Ideal for Automotive & Industrial Use
Designed for professionals in India, this tool improves cylinder sealing, extends seal life, and enhances engine performance. Skip if working on softer non-ferrous metals or delicate components.
Typical situations where Flex-Hone GBD31212 3-1/2" (89mm) Diameter | Silicon Carbide helps — illustrative scenarios, not customer reviews.
An automotive workshop in Mumbai needs to hone engine cylinders quickly and accurately.
Using the Flex-Hone GBD31212, the workshop achieves a smooth plateau finish, reduces honing time, and improves seal longevity, arriving in 11-13 days.
| Abrasive | Silicon Carbide |
| Recommended Bore Size | 3.251" - 3.500" |
| Cost per use | ₹9,780 per piece |
| Shelf life after opening | Unspecified |
| Reapplication duration | Multiple uses per tool depending on wear |
| Suitable for | Cylinder honing, deburring, radiusing |
| Use with | Hand drill, drill press, CNC |
| Feature | Flex-Hone GBD31212 3-1/2" | Others |
|---|---|---|
| Material & Finish | Silicon Carbide abrasive, produces a true plateau finish, faster ring seating | Indian-made abrasives, variable finish quality, longer honing time |
| Size Range | 3.5 inch (89mm), engineered oversized for optimal pressure | Standard sizes, less precise pressure control |
| Application Versatility | Suitable for cylinders, deburring, radiusing in industrial settings | Limited application scope, often non-automotive |
| Durability & Performance | Self-centering, wear-compensating, durable bonding | Less durable, inconsistent wear |
| SKU | erm8421 |
| GTIN | 0843469148407 |
| Brand | Flex-Hone |
| Size | 3.500" (89mm) |
| Grit | 120 |
| Material | Silicon Carbide |
| Pattern | Brush Research |
About Flex-Hone
Brush Research Manufacturing pioneered plateau honing technology in 1972, establishing a global reputation for durable, high-performance abrasive tools.
Compliance & Legal
This is a professional abrasive tool; handle with care. No specific safety warnings. Imported from USA, complies with Indian import regulations.
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This item:
Flex-Hone GBD31212 3-1/2" (89mm) Diameter | Silicon Carbide, 120 Grit, For Mild Steel & Cast Iron
9,780

This item
Flex-Hone GBD31212 3-1/2" (89mm) Diameter | Silicon Carbide, 120 Grit, For Mild Steel & Cast Iron
9,780
Total price:
17,090
You save 6,050 (26%) Extra3 items selected
3 items
17,090You save 6,050 (26%) Extra
| Attributes | Current ![]() | ![]() | ![]() | ![]() | |||
|---|---|---|---|---|---|---|---|
| Spec | |||||||
| Price | 9,780 14,630 | 5,930 6,590 | 1,380 1,920 | 2,330 3,110 | 1,680 2,440 | 3,570 4,860 | 34,930 51,400 |
| Brand Name | Flex-Hone | Flex-Hone | HIGH TECH INSTRUMENTS | YOKIVE | DMiotech | ELEGOO | Oxivir |
| Source | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail |
| Sold By | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow |
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