US No. 1557 Bur – Busch Straight Fissure Carbide, Made in Germany
The US No. 1557 is the American number for a straight fissure bur with a 1 mm head (ISO size 010): a parallel-sided cylinder with a rounded end, so it cuts straight walls with rounded internal line angles. Busch & Co. manufactures it in Germany as Busch No. 31R 010. Every US No. 1557 on this page is a genuine Busch instrument and ships from our US warehouse.
Busch & Co. GmbH
Regular price $40.99Unit price-
Busch & Co. GmbH
Regular price $40.99Unit price
Reference pages already linked from this collection, in one place.
Which US No. 1557 Do You Need?
Choose by shank; every active product in the collection is linked once below by its Busch number.
FG (high-speed handpiece)1 items
| Busch No. | US No. | Material | Cut | Shank | Best for | Pack |
|---|---|---|---|---|---|---|
| 31R 010 | 1557 | Carbide | Crosscut | FG | High-speed handpiece, rounded end | 6 |
HP (straight handpiece)1 items
| Busch No. | US No. | Material | Cut | Shank | Best for | Pack |
|---|---|---|---|---|---|---|
| 31R 010 | 1557 | Carbide | Crosscut | HP | Straight handpiece: laboratory and denture work, rounded end | 6 |
FG (friction grip, 1.6 mm shank, high-speed handpiece). HP (2.35 mm shank, straight handpiece). See the Busch Bur Size Chart for head and shank dimensions.
Speed and Technique
Run the FG versions in the high-speed handpiece with continuous water spray and light, intermittent pressure; let the blades do the work. HP versions run at laboratory speed in the straight handpiece. Maximum recommended speeds for every Busch shape are in our Dental Bur Speed Chart, and reprocessing steps in the Bur Sterilization Guide.
Made in Germany by Busch & Co.
Busch & Co. has manufactured rotary instruments in Engelskirchen, Germany since 1905. Every instrument on this page is a genuine Busch product, precision-ground on a concentric shank under ISO 13485-certified quality management and covered by our Busch warranty.
Clinical Use
- Cavity preparation: opening through enamel and establishing the straight walls and flat floor of Class I and Class II preparations, including proximal boxes.
- Restoration removal: cutting out old amalgam and composite; the crosscut blades clear the debris instead of packing with it.
- Sectioning: dividing crowns and multi-rooted teeth.
- Laboratory and denture work: the HP carbide version trims acrylic, adjusts denture bases and reduces plaster models in the straight handpiece.
At 1 mm the No. 1557 is the standard operative size.
The No. 1557 is crosscut; its plain-cut twin in the same shape and size is the US No. 1157 (Busch 21R 010). Crosscut blades cut faster and clear debris; when you need a smooth wall or a finish line, follow with the plain-cut twin or a finishing bur.
Care and Reconditioning
Busch carbide and steel burs are reusable: clean, disinfect and sterilize them between patients following the manufacturer instructions and replace them once they dull. Our Dental Bur Reprocessing & Sterilization Guide gives the steps for Busch rotary instruments.
Compare With
Related Busch collections: US No. 1157 Bur, US No. 1558 Bur, US No. 557 Bur, Straight Fissure (Cylinder) Burs, Cylinder Round Dental Burs, and Double Cut Burs: Busch Crosscut Carbide Cutters. For bur numbering and dimensions, see the Busch Bur Size Chart and the Dental Bur Glossary.
Related resources: US Bur Number Finder · Bur Comparison Chart · Speed Chart · Bur Glossary · Nearby sizes: US No. 1556, US No. 1558, US No. 1559
FAQ
What is the Busch number for a US 1557 bur?
Busch No. 31R 010 in carbide (FG/HP).
What size is a No. 1557 bur?
The No. 1557 has a 1 mm head diameter (ISO size 010) on a straight fissure bur head, ISO shape 137 (cylinder, round end).
What is the difference between a No. 1557 and a No. 1157?
Same shape and size; one is plain-cut and the other crosscut. The No. 1557 is crosscut — crosscut cuts faster and clears debris, plain-cut leaves a smoother surface.
Are Busch No. 1557 burs reusable?
Yes. Carbide and steel burs are cleaned, disinfected and sterilized between patients and replaced when they dull; the Bur Sterilization Guide gives the validated steps.
