US No. 557 Busch Carbide Straight Fissure (Cylinder) Bur | Busch No. 31 010 – Crosscut – FG | Pack of 6
The carbide cylinder fissure dental bur (Busch 31 010, US No. 557) is a precision-engineered Cylinder Flat, Excavating and Fissure Bur designed to deliver consistent, controlled cutting in demanding clinical environments. Manufactured to exacting standards, this bur is classified under ISO 500 314 107 007 010, ensuring compatibility and predictability across procedures.
Product Overview
This carbide cylinder fissure dental bur features a cylindrical flat-end geometry specifically suited for excavating carious tissue and preparing fissures with accuracy. The carbide construction provides the hardness and wear resistance required for efficient, repeatable cutting performance, making it a dependable choice for restorative workflows.
Applications
The carbide cylinder fissure dental bur is well-suited for the following clinical procedures:
| Cavity/Fissure Preparation — Opening, extending and shaping cavities and fissures with controlled removal of enamel and dentin. |
Instrument Dimensions
| Head Ø | 1.0 mm (ISO size 010) |
|---|---|
| Shank | FG (Friction Grip) — 1.60 mm Ø, 19 mm overall length (ISO 314) |
Per ISO 6360, the size number is the maximum head diameter in tenths of a millimeter. See our Busch Bur Size Chart for the full size conversion table, shank codes, and color ring guide.
Standard Classification
| Parameter | Detail |
|---|---|
| ISO Classification | 500 314 107 007 010 |
| US Number | 557 |
| Head Form | Cylinder Flat |
| Material | Carbide |
| Pack Quantity | 6 burs per pack |
Quality and Origin
As a product of Busch & Co. GmbH, each carbide cylinder fissure dental bur is made in Germany, reflecting the precision manufacturing and quality control standards the brand is known for globally. This pack of 6 offers practice-ready convenience for busy clinical settings.

FAQ
What shank type is the 31 010 bur designed for? This bur is supplied in the FG (Friction Grip) shank format, compatible with standard high-speed handpieces.
How many burs are included per pack? Each pack contains 6 individual carbide cylinder fissure dental bur units, providing an efficient supply for clinical use.
What is the ISO classification for this bur? The ISO classification is 500 314 107 007 010, which defines the shank type, head form, diameter, and length parameters.
Compare With
| Manufacturer | Reference |
|---|---|
| Komet (Gebr. Brasseler) | H31.314.010 |
| Brasseler USA | H31.31.010 |
| Meisinger | HM31-010-FG |
| SS White | 310127 |
| NTI (Kerr Rotary) | FG557-KC0 |
| Alpen (Coltène) | R100557 |
| Karl Schumacher | BCO0557F |
Manufacturer literature: Busch catalogs and product brochures for this line are available in our Busch Burs Catalog Library.

