--- title: Cross-Hole Deburring for Small Metal Parts description: BRM’s Series 81A brushes are miniature cross-hole deburring tools that feature an all-stainless steel construction. They're available in kits, too. image: https://blog.brushresearch.com/hubfs/Blog_Images/Series_81_Cross-Hole_Deburring_Tools.jpg --- - [Account Login](https://www.brushresearch.com/myaccount/) - [View Cart (0)](https://www.brushresearch.com/view-cart.php) - CALL 323-261-2193 - [![Brush Research Pintrest](https://blog.brushresearch.com/hs-fs/file-2655888633-png/brushresearch-images/pintrest.png)](http://www.pinterest.com/brushresearch/) - [![Brush Research Google+](https://blog.brushresearch.com/hs-fs/file-2655888618-png/brushresearch-images/gplus-16.png)](https://plus.google.com/+Brushresearch/posts) - [![Brush Research Linkedin](https://blog.brushresearch.com/hs-fs/file-2655888628-png/brushresearch-images/linkedin.png)](http://www.linkedin.com/company/225267?trk=pp_icon) - [![Brush Research Twiiter](https://blog.brushresearch.com/hs-fs/file-2647530532-png/brushresearch-images/twitter.png)](http://twitter.com/brushresearch) - [![Brush Research Facebook](https://blog.brushresearch.com/hs-fs/file-2647530512-png/brushresearch-images/facebook.png)](http://www.facebook.com/BrushResearch) [![Brush Research Manufacturing](https://blog.brushresearch.com/hs-fs/file-2655888638-png/brushresearch-images/logo.png)](http://www.brushresearch.com) - [About US](http://www.brushresearch.com/about.php) - [News](http://www.brushresearch.com/news.php) - [Tradeshows](http://www.brushresearch.com/tradeshows.php) - [Job Opportunities](http://www.brushresearch.com/jobs.php) - [Blog](https://blog.brushresearch.com/) - [Products](http://www.brushresearch.com/products.php) - [The Flex-Hone® Tool](http://www.brushresearch.com/product-line.php?line=1) - [The Flex-Hone® For Rotors](http://www.brushresearch.com/product-line.php?line=2) - [Flex-Hone® Tools For Firearms](http://www.brushresearch.com/product-line.php?line=3) - [Flex-Hone Kits and Accessories](http://www.brushresearch.com/product-line.php?line=4) - [Abrasive Nylon Brushes](http://www.brushresearch.com/product-line.php?line=5) - [NamPower™](http://www.brushresearch.com/product-line.php?line=13) - [Diesel and Automotive Brushes](http://www.brushresearch.com/product-line.php?line=6) - [Power Brushes](http://www.brushresearch.com/product-line.php?line=7) - [Miniature Brushes](http://www.brushresearch.com/product-line.php?line=8) - [Twisted-in-Wire Brushes](http://www.brushresearch.com/product-line.php?line=9) - [Strip Brushes](http://www.brushresearch.com/product-line.php?line=10) - [Radial Coil Brushes](http://www.brushresearch.com/custom-radial-types.php) - [Scratch and Maintenance Brushes](http://www.brushresearch.com/product-line.php?line=12) - [Parts Wash Brushes](http://www.brushresearch.com/product-line.php?line=14) - [Custom Brushes](http://www.brushresearch.com/custom-brushes.php) - [Applications](http://www.brushresearch.com/applications.php) - [Literature](http://www.brushresearch.com/literature.php) - [Catalog](http://www.brushresearch.com/literature.php?type=1) - [Technical Books](http://www.brushresearch.com/literature.php?type=2) - [Brochures](http://www.brushresearch.com/literature.php?type=3) - [Application Guides](http://www.brushresearch.com/literature.php?type=4) - [MSDS](http://www.brushresearch.com/msds.php) - [Safety Guide](http://www.brushresearch.com/safety-guide.php) - [Engineering Guide](http://www.brushresearch.com/engineering-guide.php) - [Credit and Resource Documentation](http://www.brushresearch.com/credit-resource-documentation.php) - [Tech Lab Request Forms](http://www.brushresearch.com/tech-lab-request-forms.php) - [Videos](http://www.brushresearch.com/videos.php) - [Distributors](http://www.brushresearch.com/distributors.php) - [FAQ](http://www.brushresearch.com/faq.php) - [Contacts](http://www.brushresearch.com/contact.php) ![industrial_brushes_BrushResearch-1.jpg](https://blog.brushresearch.com/hs-fs/hubfs/brushresearch-images/industrial_brushes_BrushResearch-1.jpg?width=950&name=industrial_brushes_BrushResearch-1.jpg "industrial_brushes_BrushResearch-1.jpg") # BRM Official Blog # Cross-Hole Deburring for Small Metal Parts Posted by [Team BRM](https://blog.brushresearch.com/author/team-brm) on Apr 11, 2016 7:24:58 AM - [Tweet](https://twitter.com/share) ![Series 81A Cross-Hole Deburring Tools](https://blog.brushresearch.com/hs-fs/hubfs/Blog_Images/Series_81_Cross-Hole_Deburring_Tools.jpg?width=250&name=Series_81_Cross-Hole_Deburring_Tools.jpg "Series 81A Cross-Hole Deburring Tools")Cross-hole deburring can be a big problem for manufacturers of small metal parts, especially when hole diameters are just a few millimeters or a fraction of an inch. Manual deburring is common, but it’s also labor-intensive and can  yield inconsistent results. Automated deburring is faster and more uniform, but automation alone isn’t the answer. Manufacturers who deburr small metal parts need more than just the right personnel and equipment. With cross-drilled holes, it’s especially important to use deburring tools that impart a burr-free, high-quality surface finish. As a full-line manufacturer of flexible honing tools and industrial brushes, Brush Research Manufacturing (BRM) has the solution. ## **Series 81A Miniature Deburring Brushes** BRM’s Series 81A brushes are miniature cross-hole deburring tools that feature an all-stainless steel construction that resists corrosion and “after-rust”, a problem that can affect the surfaces of parts made of stainless steel, aluminum, and other nonferrous metals. Series 81A miniature deburring tools are also used for rust removal, internal cleaning, and surface preparation. As BRM’s [Miniature Deburring Brushes brochure](https://info.brushresearch.com/miniature-deburring-brushes-series-81a) explains, Series 81A brushes are available in a range of inch-based and metric-sizes. Parts manufacturers can select cross-hole deburring tools for holes with diameters as small as 0.24” and 1 mm, and as large as 1/4” and 6.5mm”. For a complete list of brush tools sizes, download the brochure.  [![Miniature Deburring Brushes](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/484035/0002e322-a000-43cd-aa0b-f6ac3bf5f91d.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/484035/0002e322-a000-43cd-aa0b-f6ac3bf5f91d) All Series 81A brushes have an overall length of 3”, but stem diameters and trim lengths vary. Brushes with longer filaments conform closely to part contours. Brushes with shorter filaments are designed for more demanding applications. Regardless of brush-part size, all of these cross-hole deburring tools are non-loading, which means they won’t become clogged with debris.          ## **Series 81A Mini-Brush Kits** The benefits of all-stainless steel brushes are clear, but some manufacturers are reluctant to invest in a large set of cross-hole deburring tools. That’s why BRM offers [cost-effective kits](https://info.brushresearch.com/download-miniature-deburring-brush-12-piece-kit-brochure) that contain 12 miniature deburring brushes in a variety of sizes. Mini-brush kits let you try or test different Series 81A brushing tools, and generally cost less than a standard 12-pack of brushes. BRM supplies Series 81A brush tool kits in both inch-based and metric sizes. - The inch-based kit (Part No. 81AKIT) contains miniature cross-hole deburring tools in these sizes: .032, .047, .054, .079, .094, .109, .125, .142, .156, .172, and .189 inches. - The metric-based (Part No. 81AMMKIT) contains miniature cross-hole deburring tools in these sizes: 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, and 6.5 millimeters. Each BRM mini-brush kit also includes a double-ended pin vise with double collets on both ends. Series 81A brushes can also be [run under power](https://info.brushresearch.com/81a), but don’t reverse the brush inside of the hole. For more information about BRM’s cost-effective mini-brush kits for cross-hole deburring, download the Mini Brush Kit flyer [![Mini Brush Kit Flyer](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/484035/bd89e282-0c02-452d-9d8c-125ec88ffa23.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/484035/bd89e282-0c02-452d-9d8c-125ec88ffa23)   Topics: [Industrial Brushes](https://blog.brushresearch.com/topic/industrial-brushes) ### Recent Posts ### Posts by Topic - [Flex-Hone (77)](https://blog.brushresearch.com/topic/flex-hone) - [NamPower (18)](https://blog.brushresearch.com/topic/nampower) - [NamPower Abrasive Disc Brushes (16)](https://blog.brushresearch.com/topic/nampower-abrasive-disc-brushes) - [Automotive (15)](https://blog.brushresearch.com/topic/automotive) - [Industrial Brushes (12)](https://blog.brushresearch.com/topic/industrial-brushes) - [NamPower Wheels (12)](https://blog.brushresearch.com/topic/nampower-wheels) - [flex-hone for firearms (12)](https://blog.brushresearch.com/topic/flex-hone-for-firearms) - [Deburring Tools (6)](https://blog.brushresearch.com/topic/deburring-tools) - [Miniature Deburring Brushes (6)](https://blog.brushresearch.com/topic/miniature-deburring-brushes) - [Brake Rotors (5)](https://blog.brushresearch.com/topic/brake-rotors) - [Firearms Maintenance (4)](https://blog.brushresearch.com/topic/firearms-maintenance) - [Aerospace (3)](https://blog.brushresearch.com/topic/aerospace) - [Cylinder Honing (3)](https://blog.brushresearch.com/topic/cylinder-honing) - [Diamond Tools (3)](https://blog.brushresearch.com/topic/diamond-tools) - [surface finishing (3)](https://blog.brushresearch.com/topic/surface-finishing) - [wheel brushes (3)](https://blog.brushresearch.com/topic/wheel-brushes) - [Engine Rebuilds (2)](https://blog.brushresearch.com/topic/engine-rebuilds) - [Fluid Power (2)](https://blog.brushresearch.com/topic/fluid-power) - [Hydraulics (2)](https://blog.brushresearch.com/topic/hydraulics) - [Motorcycle Engines (2)](https://blog.brushresearch.com/topic/motorcycle-engines) - [WESTEC (2)](https://blog.brushresearch.com/topic/westec) - [automation (2)](https://blog.brushresearch.com/topic/automation) - [pneumatics (2)](https://blog.brushresearch.com/topic/pneumatics) - [tube brushes (2)](https://blog.brushresearch.com/topic/tube-brushes) - [End Brushes (1)](https://blog.brushresearch.com/topic/end-brushes) - [FABTECH (1)](https://blog.brushresearch.com/topic/fabtech) - [Power Brushes (1)](https://blog.brushresearch.com/topic/power-brushes) - [SOUTHTEC (1)](https://blog.brushresearch.com/topic/southtec) - [Send In Your Part (1)](https://blog.brushresearch.com/topic/send-in-your-part) - [WESTEC 2015 (1)](https://blog.brushresearch.com/topic/westec-2015) - [Wire Cup Brushes (1)](https://blog.brushresearch.com/topic/wire-cup-brushes) - [anodized cylinders (1)](https://blog.brushresearch.com/topic/anodized-cylinders) - [brakes (1)](https://blog.brushresearch.com/topic/brakes) - [cbn flex-hone (1)](https://blog.brushresearch.com/topic/cbn-flex-hone) - [chamfer blending (1)](https://blog.brushresearch.com/topic/chamfer-blending) - [chamfer honing (1)](https://blog.brushresearch.com/topic/chamfer-honing) - [deburring (1)](https://blog.brushresearch.com/topic/deburring) - [diesel (1)](https://blog.brushresearch.com/topic/diesel) - [flex-hone for rotors (1)](https://blog.brushresearch.com/topic/flex-hone-for-rotors) - [imts (1)](https://blog.brushresearch.com/topic/imts) - [machined parts (1)](https://blog.brushresearch.com/topic/machined-parts) - [machined superalloys (1)](https://blog.brushresearch.com/topic/machined-superalloys) - [metalworking (1)](https://blog.brushresearch.com/topic/metalworking) - [planar honing (1)](https://blog.brushresearch.com/topic/planar-honing) - [plateau finishing (1)](https://blog.brushresearch.com/topic/plateau-finishing) - [pumps (1)](https://blog.brushresearch.com/topic/pumps) - [shotguns (1)](https://blog.brushresearch.com/topic/shotguns) - [valves (1)](https://blog.brushresearch.com/topic/valves) see all ### Sign-Up for BRM's Company Newsletter! [![logo_sgs](https://blog.brushresearch.com/hs-fs/hubfs/brushresearch-images/logo_sgs.jpg?width=89&name=logo_sgs.jpg)](http://www.us.sgs.com/) [![logo_sgs](https://blog.brushresearch.com/hs-fs/hubfs/brushresearch-images/order-by-number.jpg?width=89&name=order-by-number.jpg)](http://www.brushresearch.com/order-by-part-number.php) - [Home](http://www.brushresearch.com) - [About Us](http://www.brushresearch.com/about.php) - [Products](http://www.brushresearch.com/products.php) - [Applications](http://www.brushresearch.com/applications.php) - [Literature](http://www.brushresearch.com/literature.php) - [Videos](http://www.brushresearch.com/videos.php) - [Locate a Distributor](http://www.brushresearch.com/distributors.php) - [Frequently Asked Questions](http://www.brushresearch.com/faq.php) - [Flex-Hone](http://www.brushresearch.com/flex-hone.php) - [Deburring Brush](http://www.brushresearch.com/deburring-brush.php) - [Automotive Brush](http://www.brushresearch.com/automotive-brush.php) - [Abrasive Nylon Brush](http://www.brushresearch.com/abrasive-nylon.php) - [Flex-Hone Tool and Gun Cleaning Brushes](http://www.brushresearch.com/flexhone_gun_cleaning_brush.php) - [Wire Brushes](http://www.brushresearch.com/wire_brushes.php) - [Cylinder Hones](http://www.brushresearch.com/cylinder_hones.php) - [Engine Hones](http://www.brushresearch.com/engine-hone.php) - [Flex Hone Sizes](http://www.brushresearch.com/flex-hone-sizes.php) - [Flex Hone Dealers](http://www.brushresearch.com/flex-hone-dealer.php) - [Flex Hone Instructions](http://www.brushresearch.com/flex-hone-instructions.php) - [Sitemap](http://www.brushresearch.com/site-map.php) Brush Research Manufacturing Co., Inc. © 2015 - [Terms of Use](http://www.brushresearch.com/terms-of-use.php) - [Privacy Statement](http://www.brushresearch.com/privacy.php) - [Terms and Conditions](http://www.brushresearch.com/terms-conditions.php)