Gręžtuvas Amerika – D/ACO3/4 3/4 sumažinto kobalto grąžtas su 1/2 kotu, D/ACO serija 3/4 1/2 kotu

Brand:Drill America

3.2/5

64.31

Pagamintas iš karščiui atsparaus kobalto ir sumaltas iki didelio atsparumo 135° padalijimo taško. Bendra rievė ir bendras ilgis minimaliam reguliavimui keičiant įrankį. Tikslus šlifavimas, užtikrinantis didelį koncentriškumą tarp koto ir korpuso skersmens. Idealiai tinka gręžti kietas, didelio tempimo stiprumo medžiagas. Išplečia nešiojamojo gręžimo griebtuvo dydžio diapazono talpą. Bendra rievė ir bendras ilgis minimaliam reguliavimui keičiant įrankį. Tikslus šlifavimas, užtikrinantis didelį koncentriškumą tarp koto ir korpuso skersmens. Idealiai tinka mažo ir vidutinio atsparumo tempimui medžiagoms gręžti.

Nėra vienetų
Pagaminta pagal Nacionalinį aviacijos ir kosmoso standartą 907. Paleidžiant prieš laikrodžio rodyklę (pjovimas dešine), spiraliniai rievės įrankiai pašalina drožles aukštyn ir iš pjūvio, kad sumažintų užsikimšimą. Apvalūs kotai leidžia naudoti su įvairiomis įrankių laikymo sistemomis. Aukso oksidas yra plonesnis oksido paviršiaus apdorojimas nei juodasis oksidas, paprastai naudojamas kobalto plieno įrankiams identifikuoti; veikimas yra panašus į nepadengtus įrankius. Kobalto plieno įrankiai yra panašūs į greitaeigį plieną, tačiau juose yra daugiau kobalto, kad būtų geriau pjaustomi kietesni metalai, pavyzdžiui, nerūdijantis plienas ar nikelio lydiniai.
Country of Origin USA
Cutting Angle String 135 Degrees
Cutting Diameter 0.75 Inches
Finish Type Gold Oxide
Is Discontinued By Manufacturer No
Item model number D/ACO3/4
Manufacturer Drill America
Material Cobalt Steel
Product Dimensions 6 x 1.3 x 1.2 inches; 1.16 Ounces
Shank Type Round

3.2

9 Review
5 Star
66
4 Star
11
3 Star
6
2 Star
3
1 Star
15

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Scritto da: Wayne S.
Cobalt Hardened for Hard Metals
Cuts through stainless and hardened steels where titanium and others fail. Use some oil to preserve its edge for longer life.
Scritto da: Laura
Stainless steel
Just a couple of holes in 1/2" ss.
Scritto da: ratflinger
Quality bit
Bought a cheaper bit 1st - it failed immediately so I ordered this bit from Drill America. This bit drilled the 16 holes I needed and was still going strong at the end. Drill America bits stand up to the test.
Scritto da: GSD
Need a hole in your head?
Ok, maybe not the noggin! But for drilling steel this bit worked as a cobalt bit should. No issues, and it cut fast. Drilled through 1/4 plate steel pretty quickly using a 20 volt cordless drill. Quality seems good and was cheaper than big brand names. Like the reduced shank so i could use in 1/2" drill. Nothing worse then having a bunch of drill bits with the size worn off from slippage, so pick up a couple.
Scritto da: Mr. Geweke
worked well enough at a difficult task
Lasted about 2 hours of use against hardened steel before starting to dull. Would last a lot longer against mild steel and even longer with soft metals.
Scritto da: Earl Burns
Very sharp.
Drilled 15 holes through 1 in plate steel just fine. I used tap magic and a drill press.
Scritto da: Seth VanNuys
Legit
Had a project to drill 4x 5/8 holes in hardened steel. I had ordered 3 Cobalt hss bits from two different brands. Each failed drilling only about an 1/8" of the material. Ordered the bit from Drill America and finished the first hole in 20sec or less and went on to do the other three holes without issue using the single bit.
Scritto da: Mac user
Stepped shank drill doesn't run true
I bought a 33/64" stepped shank drill to cut close fit clearance holes for a 1/2-13 fastener. I mounted the drill on the 3 shank flats and noted significant runout (I'm guessing at least 1/16" runout) at the tip of the drill. So I tried mounting it on the 1/2" cylindrical surface. With the drill in that position, the bit cuts a hole that is 17/32" in diameter. So, it appears neither the stepped shank or the flats allow the drill to run concentric with the cutting tip. As a result I'll be avoiding Drill America bits in the future.
Scritto da: Richard
Well cutting!
As expected, fast delivery!

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