US No. 563 Busch Carbide Straight Fissure (Cylinder) Bur | Busch No. 31 023 – Crosscut – HP | Pack of 6
The carbide cylinder flat cutter dental bur from Busch & Co. GmbH is a precision-engineered rotary instrument designed for demanding applications across dental and technical disciplines. Featuring a cylinder flat cutting geometry, this carbide cutter delivers controlled material removal with consistent results on a wide range of substrates.
Product Details
This instrument is classified under ISO: 500 104 107 007 023 (US No. 563) and is supplied as a convenient pack of 6, ensuring an uninterrupted workflow in busy clinical or laboratory settings. The carbide construction provides exceptional hardness and wear resistance, making it well-suited for repeated use across a variety of materials.
Applications
As a carbide cylinder flat cutter dental bur, this instrument is manufactured in Germany to rigorous quality standards, reflecting Busch & Co. GmbH's long-standing reputation for precision rotary tools.
The carbide cylinder flat cutter dental bur is well-suited for the following dental laboratory applications:
| Crown and Bridge Technology — Shaping, trimming and finishing of crown and bridge frameworks in the laboratory. | |
| Plastics Technology — Shaping, trimming and finishing of acrylic dentures and appliances. | |
| Model Making — Trimming and detailing of plaster and stone models. | |
| Model Casting Technique — Finishing and adjustment of cast metal frameworks. |
Instrument Dimensions
| Head Ø | 2.3 mm (ISO size 023) |
|---|---|
| Shank | HP (Straight Handpiece) — 2.35 mm Ø, 44.5 mm overall length (ISO 104) |
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.
Why Choose This Carbide Cutter?
The flat-end cylinder profile of this carbide cylinder flat cutter dental bur allows for flat-bottomed preparations and defined shoulder lines, making it a versatile choice in both clinical and laboratory environments. The carbide construction ensures longevity and reliable cutting efficiency throughout the instrument's service life.
Busch Warranty & 90-Day Returns
This Busch instrument is guaranteed against manufacturing and workmanship defects — we'll repair or replace it under normal professional use. Unused product in original packaging can also be returned or exchanged within 90 days of your invoice date. Full terms are on our Warranty page.

FAQ
What is the ISO classification for this bur? This instrument is classified as ISO: 500 104 107 007 023.
How many burs are included per pack? Each pack contains 6 burs.
Where is this bur manufactured? This carbide cylinder flat cutter dental bur is made in Germany by Busch & Co. GmbH.
Compare With
| Manufacturer | Reference |
|---|---|
| Komet (Gebr. Brasseler) | H31.104.023 |
| Meisinger | HM31-023-HP |
| SS White | 310070 |
Manufacturer literature: Busch catalogs and product brochures for this line are available in our Busch Burs Catalog Library.
Specifications: Busch No. 31 023
| Busch figure | 31 |
| US No. | 563 |
| Shape | Straight Fissure (Cylinder) |
| ISO size / head diameter | 023 (2.3 mm max head Ø) |
| Cut type / toothing | Crosscut |
| Shank | HP |
| Lab applications (per Busch) | Crown and Bridge Technology, Model Casting Technique, Model Making, Plastics Technology |
| Pack size | Pack of 6 |
| Material | Carbide |
The straight fissure (cylinder) head has parallel sides and a flat end, so it cuts straight-walled slots, flat steps and parallel surfaces. As a medium crosscut cutter it does the main shaping work between bulk reduction and finishing. At 2.3 mm the head is a general-purpose size for routine lab shaping and contouring.
Read the guides: Dental Laboratory Burs, Polishers & Abrasives · Bur Speed Chart · Dental Bur Glossary · All lab carbide cutters
This is a US No. 563. See all 2 Busch versions — materials, shanks, cuts and packs — on our US No. 563 page.

