Hardness scale

[AskBud]

Here is a link to a hardness scale that Lawrence posted.
If may help to understand the need to adjust your "Max-Pass-depth" and reason to opt for "Optimal" carve setting with the Raster (carving) bit as well.
AskBud
http://forum.carvewright.com/showthread.php?18222-Broken-Cutting-Bits-when-drilling-holes&p=153770#post153770

[lawrence]

Ipe (http://forum.carvewright.com/species_ipe.html) / Brazilian Walnut (http://forum.carvewright.com/species_ipe.html) / Lapacho (http://forum.carvewright.com/species_lapacho.html) 3684 Cumaru (http://forum.carvewright.com/species_cumaru.html) / Brazilian Teak (http://forum.carvewright.com/species_cumaru.html) 3540 Ebony (http://forum.carvewright.com/species_ebony.html) 3220 Brazilian Redwood (http://forum.carvewright.com/species_br_redwood.html) / Paraju (http://forum.carvewright.com/species_paraju.html) 3190 Angelim Pedra (http://forum.carvewright.com/species_angelimpedra.html) 3040 Bloodwood (http://forum.carvewright.com/species_bloodwood.html) 2900 Red Mahogany (http://forum.carvewright.com/species_redmahogany.html) / Turpentine (http://forum.carvewright.com/species_turpentine.html) 2697 Spotted Gum (http://forum.carvewright.com/species_spottedgum.html) 2473 Brazilian Cherry (http://forum.carvewright.com/species_jatoba.html) / Jatoba (http://forum.carvewright.com/species_jatoba.html) 2350 Mesquite 2345 Santos Mahogany (http://forum.carvewright.com/species_mahogany.html) / Bocote (http://forum.carvewright.com/species_bocote.html) / Cabreuva (http://forum.carvewright.com/species_cabreuva.html) 2200 Pradoo (http://forum.carvewright.com/species_pradoo.html) 2170 Brushbox (http://forum.carvewright.com/species_brushbox.html) 2135 Karri (http://forum.carvewright.com/species_karri.html) 2030 Sydney Blue Gum (http://forum.carvewright.com/species_sydneyblue.html) 2023 Bubinga (http://forum.carvewright.com/species_bubinga.html) 1980 Cameron (http://forum.carvewright.com/species_cameron.html) 1940 Tallowwood (http://forum.carvewright.com/species_tallowwood.html) 1933 Merbau (http://forum.carvewright.com/species_merbau.html) 1925 Amendoim (http://forum.carvewright.com/species_amendoim.html) 1912 Jarrah 1910 Purpleheart (http://forum.carvewright.com/species_purpleheart.html) 1860 Goncalo Alves (http://forum.carvewright.com/species_goncalo.html) / Tigerwood (http://forum.carvewright.com/species_tigerwood.html) 1850 Hickory (http://forum.carvewright.com/species_hickory.html) / Pecan (http://forum.carvewright.com/species_pecan.html) / Satinwood (http://forum.carvewright.com/species_satinwood.html) 1820 Afzelia (http://forum.carvewright.com/species_afzelia.html) / Doussie (http://forum.carvewright.com/species_doussie.html) 1810 Bangkirai (http://forum.carvewright.com/species_bangkirai.html) 1798 Rosewood (http://forum.carvewright.com/species_rosewood.html) 1780 African Padauk (http://forum.carvewright.com/species_padauk.html) 1725 Blackwood (http://forum.carvewright.com/species_blackwood.html) 1720 Merbau (http://forum.carvewright.com/species_merbau.html) 1712 Kempas (http://forum.carvewright.com/species_kempas.html) 1710 Locust (http://forum.carvewright.com/species_locust.html) 1700 Highland Beech (http://forum.carvewright.com/species_highlandbeech.html) 1686 Wenge (http://forum.carvewright.com/species_wenge.html) / Red Pine (http://forum.carvewright.com/species_pine.html) 1630 Tualang (http://forum.carvewright.com/species_tualang.html) 1624 Zebrawood (http://forum.carvewright.com/species_zebrawood.html) 1575 True Pine (http://forum.carvewright.com/species_pine.html) / Timborana (http://forum.carvewright.com/species_timborana.html) 1570 Peroba (http://forum.carvewright.com/species_peroba.html) 1557 Kambala (http://forum.carvewright.com/species_kambala.html) 1540 Sapele (http://forum.carvewright.com/species_sapele.html) / Sapelli (http://forum.carvewright.com/species_sapele.html) 1510 Curupixa (http://forum.carvewright.com/species_curupixa.html) 1490 Sweet Birch (http://forum.carvewright.com/species_birch.html) 1470 Hard Maple (http://forum.carvewright.com/species_maple.html) / Sugar Maple (http://forum.carvewright.com/species_maple.html) 1450 Coffee Bean (http://forum.carvewright.com/species_coffeebean.html) 1390 Natural Bamboo (http://forum.carvewright.com/species_bamboo.html) (represents one species) 1380 Australian Cypress (http://forum.carvewright.com/species_cypress.html) 1375 White Oak (http://forum.carvewright.com/species_oak.html) 1360 Tasmanian Oak (http://forum.carvewright.com/species_tasmanianoak.html) 1350 Ribbon Gum (http://forum.carvewright.com/species_ribbongum.html) 1349 Ash (White) (http://forum.carvewright.com/species_ash.html) 1320 American Beech (http://forum.carvewright.com/species_beech.html) 1300 Red Oak (Northern) (http://forum.carvewright.com/species_oak.html) 1290 Carribean Heart Pine (http://forum.carvewright.com/species_pine.html) 1280 Yellow Birch (http://forum.carvewright.com/species_birch.html) 1260 Movingui (http://forum.carvewright.com/species_movingui.html) 1230 Heart Pine (http://forum.carvewright.com/species_pine.html) 1225 Carbonized Bamboo (http://forum.carvewright.com/species_bamboo.html) (represents one species) 1180 Cocobolo (http://forum.carvewright.com/species_cocobolo.html) 1136 Brazilian Eucalyptus (http://forum.carvewright.com/species_eucalyptus.html) / Rose Gum (http://forum.carvewright.com/species_roserivergum.html) 1125 Makore (http://forum.carvewright.com/species_makore.html) 1100 Boreal (http://forum.carvewright.com/species_boreal.html) 1023 Black Walnut (http://forum.carvewright.com/species_walnut.html) 1010 Teak (http://forum.carvewright.com/species_teak.html) 1000 Sakura (http://forum.carvewright.com/species_sakura.html) 995 Black Cherry (http://forum.carvewright.com/species_cherry.html) / Imbuia (http://forum.carvewright.com/species_imbuia.html) 950 Boire (http://forum.carvewright.com/species_boire.html) 940 Paper Birch (http://forum.carvewright.com/species_birch.html) 910 Cedar (http://forum.carvewright.com/species_cedar.html) 900 Southern Yellow Pine (Longleaf) (http://forum.carvewright.com/species_pine.html) 870 Lacewood (http://forum.carvewright.com/species_lacewood.html) / Leopardwood (http://forum.carvewright.com/species_leopardwood.html) 840 Parana (http://forum.carvewright.com/species_parana.html) 780 Sycamore (http://forum.carvewright.com/species_sycamore.html) 770 Shedua (http://forum.carvewright.com/species_shedua.html) 710 Southern Yellow Pine (Loblolly and Shortleaf) (http://forum.carvewright.com/species_pine.html) 690 Douglas Fir 660 Larch (http://forum.carvewright.com/species_larch.html) 590 Chestnut (http://forum.carvewright.com/species_chestnut.html) 540 Hemlock (http://forum.carvewright.com/species_hemlock.html) 500 White Pine (http://forum.carvewright.com/species_pine.html) 420 Basswood (http://forum.carvewright.com/species_basswood.html) 410 Eastern White Pine (http://forum.carvewright.com/species_pine.html) 380

Just in case you don't want to click-- sorry I don't remember where I got it but it was from the net somewhere (I have it saved on my desktop) The janka scale is the industry standard for rating hardwood floor hardness. One thing it does not show is that some woods are also more prone to have other "stuff" that can mess with your bits-- abundances of hardspots or knots etc. Also some woods, especially those that grow in sandy areas or have "open" bark (mesquite or teak for example) has a lot of silicates in it that are VERY hard on tools.

If anyone knows how hard corian is on the janka scale I'd love to know--I couldn't find info on it anywhere.

Lawrence

[CarverJerry]

So I take it that the higher the number on the janka scale the harder the wood. Like on the Rockwell scale for hardness of steel the higher the number the harder the steel is and it is also more brittle past a certain point..

CJ