I. What Are Diamond Frankfurt Abrasive Grinding Blocks?
Diamond Frankfurt Abrasive Grinding Blocks-also commonly referred to as Horseshoe Abrasive Grinding Blocks or Frankfurt Bricks/Blocks-are specialized, elongated diamond abrasive tools featuring mounting slots. Designed specifically for automated stone polishing machines (continuous polishing lines), their shape closely resembles a horseshoe, making them compatible with "Frankfurt-type" grinding head bases.
II. Structure and Specifications
1. Overall Structure (Three Layers)
- Working Layer (Diamond Segments): Composed of a metal or resin bond matrix mixed with diamond grit; responsible for the actual grinding action.
- Transition Layer: A welded or bonded interface connecting the diamond segments to the base body.
- Base Body (Base Plate): Constructed from cast iron or aluminum alloy, featuring standard mounting slots that allow it to be securely locked directly onto the grinding machine's polishing plate.
(8-Segments metal Diamond Frankfurt Abrasive schematic diagram)
2. Standard Dimensions (Universal)
- Length × Width × Height: 140 × 70 × 20 mm (the mainstream size) and 170 × 70 × 20 mm.
- Mounting Slots: Standard Frankfurt-type slots, compatible with virtually all imported and domestically produced automated polishing machines (e.g., Italian BM models, Fujian Shuitou models).
III. Bond Type Classification and Key Characteristics
1. Metal-Bonded Frankfurt Blocks (The Workhorse for Coarse/Medium Grinding)
- Material: Iron-based or copper-based powder metallurgy matrix mixed with diamond grit, processed via high-temperature hot-press sintering.
- Grit Size: #36 – #240 (Coarse grinding: #36/#46; Medium grinding: #60/#80/#120).
- Characteristics: Long service life (3–5 times longer than resin-bonded blocks), excellent cutting sharpness, high wear resistance, and strong diamond retention. Ideal for the coarse grinding, leveling, and removal of saw marks on granite, quartz stone, and hard marble.
(Metal Bond Diamond Frankfurt Abrasive)
2. Resin-Bonded Frankfurt Abrasives (Fine Grinding / Polishing)
- Composition: Resin powder + Diamond, low-temperature cured;
- Grit Sizes: #400 – #3000 (Fine Grinding: #400/#800; Polishing: #1500/#3000);
- Features: Excellent polishing results, high gloss finish, superior self-sharpening properties, and minimal risk of edge chipping. Suitable for the fine grinding, precision polishing, and glossing of marble, limestone, and artificial stone.
(Resin Bond Diamond Frankfurt Abrasive)
3. Composite bond Frankfurt Abrasive
With the advancement of the natural and artificial stone industries, factories' processing demands for abrasive tools have become increasingly sophisticated. The market has seen the emergence of various new products, including Bakelite-backed abrasives, horseshoe-shaped grinding blocks featuring composite bonds (incorporating abrasives such as silicon carbide), and composite horseshoe blocks(Frankfurt Abrasive) that combine both metal and resin bonding agents. These innovative horseshoe-shaped abrasive tools have significantly expanded the range of options available to factories.
(diamond frankfurt abrasive with bakelite base)
4. Classical Frankfurt Abrasive
Although metal-bonded and resin-bonded horseshoe(Frankfurt Abrasive) grinding blocks are widely utilized by the majority of factories, magnesite-bonded and oxalic acid-bonded horseshoe blocks remain popular and well-received by many users.
Ⅳ. Primary Applications and Suitable Objects
1 Compatible Equipment
- Automatic Continuous Stone Polishing Machines (utilizing Frankfurt-style grinding heads; standard in the mainstream stone processing hubs of Shuitou, Fujian, and Yunfu, Guangdong);
- Semi-automatic Polishing Machines and Hand-held Grinders (when fitted with an adapter plate).
2 Processing Sequence (Standard Workflow)
- Metal-Bonded Frankfurt (#36 – #60): Coarse grinding, leveling, and removal of the rough surface layer;
- Metal-Bonded Frankfurt (#80 – #120): Medium grinding, removal of coarse scratches, and surface flattening;
- Resin-Bonded Frankfurt (#400 – #800): Fine grinding, removal of fine scratches, and preliminary glossing;
- Resin-Bonded Frankfurt (#1500 – #3000): Precision polishing, achieving a mirror-like effect and high-gloss finish.
VI. Core Advantages
- High Efficiency: Features a large single-block grinding area, delivering an efficiency on automated lines that is 3–5 times higher than that of traditional magnesite grinding blocks.
- Durability: The metal-bonded version offers an extended service life, reducing the frequency of tool changes and lowering labor costs.
- High Versatility: Equipped with standard mounting slots compatible with all major automated grinding machines, ensuring easy and convenient replacement.
- Consistent Results: Provides uniform grinding and ensures a high degree of surface flatness, thereby minimizing the need for subsequent repairs.
Since Cheefung company was founded in 2006, we have always focused on the R&D and manufacturing of diamond abrasives. At present, our products are mature and stable. Our diamond fickert abrasives and frankfurt abrasives are sold directly to manufacturers, with high cost performance. At present, they are stably supplied to the Shuitou market, Brazil, Türkiye, India, Spain and Italy.