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Interesting 7 1/4 saw blade from Harbor Freight

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Forum topic by Lee Barker posted 05-07-2013 04:11 PM 1505 views 0 times favorited 17 replies Add to Favorites Watch
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Lee Barker

2169 posts in 1570 days


05-07-2013 04:11 PM

Look at the picture here

And after you’ve made your assumptions, read the description.

What exactly would be be buying?

Kindly,

Lee

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"


17 replies so far

View Loren's profile

Loren

7809 posts in 2368 days


#1 posted 05-07-2013 04:20 PM

I’m not sure… it sounds like a plane old steel blade at
first glance, but then it wouldn’t have brazed tips. I
did a little searching for m2 as a blade tip and this is
what I came up with.

“M2 is a high speed steel in tungsten-molybdenum series. The carbides in it are small and evenly distributed. It has high wear resistance. After heat treatment, its hardness is the same as T1, but its bending strength can reach 4700 MPa, and its toughness and thermoplasticity are higher than T1 by 50%. It is usually used to manufacture a variety of tools, such as drill bits, taps and reamers. Its decarburization sensitivity is a little bit high.[9]”

http://en.wikipedia.org/wiki/High_speed_steel

-- http://lawoodworking.com

View Tim's profile

Tim

1322 posts in 682 days


#2 posted 05-07-2013 04:30 PM

Yeah M2 steel has more molybdenum, so saying the tips are molybdenum like the product’s page title does is misleading, but saying it has M2 tips with molybdenum is better. It’s high speed steel but I don’t quite understand where steel stops and carbides start if the description Loren quoted is correct.

View poopiekat's profile

poopiekat

3709 posts in 2454 days


#3 posted 05-07-2013 04:40 PM

@Lee:
Hey, you bum, you directed me to a Harbor Freight site…
Now I’ve gotta soak my eyes in anti-septic.
How about a cautionary heads-up? Yucko!
(to say nothing of standing in the line of fire of a HF carbide-tipped blade whirling at 3500 rpm, just a little more damaging to the eyes..) :-^

-- Einstein: "The intuitive mind is a sacred gift, and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift." I'm Poopiekat!!

View crank49's profile

crank49

3481 posts in 1691 days


#4 posted 05-07-2013 04:51 PM

This is high speed steel.
Not a hard as tungsten carbide, but much tougher.
Harder than normal steel blades.

With the appropriate rake angle it could be used to cut metal.
They do make circular saws and blades for cutting metal. But I don’t think this is one of them.

Should be just what they say it is. A wood cutting blade that can tolerate hitting nails and such.
Might be a good “Demo” blade for modellers.

Lots of steels have carbides in them. It’s a particular molecular arrangement of carbon and iron atoms. These are not the same as tungsten carbide or chrome carbide.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

View MrRon's profile

MrRon

2928 posts in 1964 days


#5 posted 05-07-2013 06:20 PM

This is just a plain garden variety saw blade for “Skil” type saws. HSS tips instead of carbide tips are braized unto a carbon steel plate. Probably won’t last as long as carbide. Definitely a throw-away bade. It is used to cut wood. A blade used to cut steel, will run at a very slow speed, somewhere around 180 RPM’s.

View Gene Howe's profile (online now)

Gene Howe

5916 posts in 2149 days


#6 posted 05-07-2013 06:26 PM

Buy ten and frame a house.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View crank49's profile

crank49

3481 posts in 1691 days


#7 posted 05-07-2013 07:43 PM

MrRon, our shop has a handheld circular saw, that runs at 3,700 RPM, with an 8” blade and will cut steel plate up to 3/4” in theory. We use it to cut bar type floor grate. Our saw is an industrial unit that cost over $800, but Milwaukee has one with the same specs for around $350.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

View RogerInColorado's profile

RogerInColorado

298 posts in 674 days


#8 posted 05-07-2013 08:42 PM

According to Wikipedia, Molybdenum powder is used as a fertilizer.

View guitchess's profile

guitchess

82 posts in 2429 days


#9 posted 05-07-2013 08:51 PM

Regardless of the technical specs, I’ve tried these and they are one of the HF fails. While they are sharp, and moderately durable, they are not well balanced, vibrate badly, and take a larger kerf than necessary. The body of the blade is also poor quality material so as it heats up the blade flexes, letting the blade wander.


My suggestion is to not waste your time/money.

View 1thumb's profile

1thumb

78 posts in 876 days


#10 posted 05-07-2013 09:31 PM

$3.99. It’s for the amigos

View gtbuzz's profile (online now)

gtbuzz

377 posts in 1162 days


#11 posted 05-08-2013 02:23 AM

I dunno about everyone else but I wish all manufacturers would stamp lightning bolts into their saw blades. Some flames would be really cool too.

View Dez's profile

Dez

1121 posts in 2797 days


#12 posted 05-08-2013 05:11 AM

At that price and based on the picture and deciphered description I would probably by at least two!

-- Folly ever comes cloaked in opportunity!

View RichiePrimo's profile

RichiePrimo

2 posts in 565 days


#13 posted 05-08-2013 06:36 AM

The ad did get me wondering about a few things. Notice on the right side in the “Accessories You’ll Need” list, there’s a Circular Saw priced at $31.39. Considering that it is a HF ad, what I fail to understand is…

1. Do they actually consider the saw to be an accessory to the blade?

2. Which item do you think would hold up longer?

3. Is my very first post on this forum concerning a $3.99 saw blade sold by Harbor Freight?!?

-- "If it ain't broke... fix it anyway!"

View Tony_S's profile

Tony_S

440 posts in 1803 days


#14 posted 05-08-2013 10:00 AM

$4.00 for a Circ. saw blade?....that pretty much answers any questions I might have before I even ask them.

View RichiePrimo's profile

RichiePrimo

2 posts in 565 days


#15 posted 05-08-2013 09:30 PM

Hi Tony – my tongue was planted firmly in cheek on the post, so please chalk it up to a (presumably) weak attempt at wit. But hey, it was 3:00 AM and I had consumed a sudsy beverage… or 12.

I’ll take a mulligan on that one, but I usually get better with time :-)

-- "If it ain't broke... fix it anyway!"

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