Features Listed on Box
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Recently I've started working
collets in my drill press
some of the operations that I
would do in a lathe if I had a lathe. But there is a
need to cut
the raw material and end up with an end that's square and
smooth. Ordered from Harbor Freight: Mini Cut-off
on 27 Nov 2007 and it came today 8 Dec 2007.
This may be a design based on the Proxxon KG 50 Cutoff
The Proxxon has more features and I'm sure is a much higher
product, but at a much much higher price. They both use
that fit a 3/8" arbor 2" dia blades. The KG 50 is listed
European web site.
show up in the 2.5
Features Listed on Box
- Make perfect cuts in 1/10 the time it takes to cut by
- Cuts are smooth and accurate - no need to sand cut ends.
- 110 VAC, 60 Hz, 0.9 Amps, 7800 Max PRM
- Arbor: 3/8", Cutting depth: 3/4"
- Miter gauge: 0 - 45º
Be sure to remove the saw blade that's taped to the box before
the box (best to keep the box for storage). The blade
needs to be
installed prior to use. The
cover can be removed by just slipping it up. The arbor has
that centers the blade. It attaches with a Phillips #2
screw. The front edge of the blade moves down (Counter
in the photo at the left) and there's an arrow printed on the
that it's gets installed in the proper way.
Three Replacement blades are HF Item42085
They are marked:
#42805, Fits #42307 Mini Cut-off Saw, Max RPM 13,000
The blister pack is marked:
M2 High Speed Steel, 2" dia., 3/8" Arbor.
There are 100 teeth on a 2" diameter circle which works out to a
of 0.0314" (0.8 mm).
The rule of thumb is the material should be at least as thick as
blade pitch. This blade would be suitable for cutting thin
material. Unlike the blade I mistakenly got for the drill press
where the pitch was
not suitable for small diameter stock.
I've heard the Proxxon KG 50 is very sensitive to the pressure
to the handle and it has a saw with three times larger
This saw may have the finest pitch blade which helps when
If you apply too much pressure and the pitch is greater than the
material thickness the saw may advance so much that when the
comes around the depth of cut is more than it can handle and it
stalls. When there's at least one tooth in the material at
times, then you can not advance the blade without feeling the
slow. Having a few teeth in the material is even
The old metal working books have some tips like mounting sheet
in a sandwitch between blocks of material of similar density
The blade is 0.024" thick ( 0.61 mm) and leaves a kerf of about
The red plastic post behind the 3/8" brass rod is a safety
prevents the saw from being lowered until the red plastic button
top of the handle is pressed.
A 3" diameter blade would clear the motor housing, but not the
plastic blade cover.
Harbor Freight sells a 3" OD abrasive cutoff wheel (44812
that has the same
arbor size and fits this saw, but the OD is larger and the gray
guard does not fit. I used one to cut the end off of the
hardened steel cutting bar from the 8" Mini Shear Break.
normal saw or a hack saw would not touch the metal. I kept
parts of my body out of the saw plane incase it exploded and was
wearing safety glasses. It took a couple of hours to make
23 March 2008 - The saw blade is not suited
cutting iron, but the abrasive wheel will cut a 1/2 x 1" iron
it takes some number of hours. In exchange you get a cut
almost a mirror finish. A portable or fixed band saw would
much better for cutting iron.
The saw can be anchored to a table using two #8 Flat head
3.3" (84 mm) c-c. Either wood screws if you have a wood
surface or machine screws if working with through holes.
is a die casting, not plastic. The supplied "C" clamp fits
slot at the front center of the base and works well. This
big advantage that it's very quick and easy to install the saw
want to use it, and store it otherwise, thus not taking up
Once the blade is installed if
pick-up the saw it's easy to grab the blade.
The vise can be rotated so that
cut can be made. The vise is die case not plastic.
can be seen in the photos the movable vise jaw has a "V" groove
be used when holding round stock. But they put the "V" on
wrong face. The way it is the movable jaw can pivot about
clamping screw centerline a few degrees so the cut will be a few
degrees from 90. If the rear jaw had the "V" groove then
angle would be near perfect.
Packing material could be placed between the movable jaw and the
piece so the "V" groove would not try to control the position of
work piece. Note there is a raised floor that's 0.588"
about 0.080" high at the bottom center of the vise. The
the left (rear in photo at left) is 0.010" lower than the raised
floor. Note this raised floor is to allow the blade to cut
the way through the work piece without making a slot in the base
clear the blade.
The pivot pin can be seen in this photo of the vise when it's
from the saw. Notice just above and to the right of the
the vise has a miter cut to clear the blade when making a miter
cut. The square nut on the vise clamp bolt rides in a
groove under the saw base.
If the vice is removed then the blade will cut into the
There's a bump on the bottom of the motor assembly coaxial with
arbor that hits the top of the vice and that stops the motor
from going any lower. At that point the blade is below the
of the raised part of the vice bed between the jaws.
The toothed belt is being driven 1:1 from the motor. The
DO NOT CRIMP 88 MXL B 110 MXL 025
05 043 JIEBAO
It's a little over 6.5 mm wide.
I ordered a spare belt and it arrived with the saw.
It took just a few minutes to
saw to my garage work bench and clamp it down. It took a
seconds to cut off a slice from the 3/8" brass rod.
I'm thinking I'll store the saw in it's box rather than take
space by installing since it's so easy to set up.
can see some saw marks the end is almost mirror like.
back side of the slice has the saw marks from On Line Metals
probably cut using a power hack saw. The Mini Cut-off
saw is much
Notice it's easy to cut off a thin slice of material.
Using a couple of 123 Blocks
clear that the cut is not square, but that not unexpected (see
By pressing this rod down to the bottom of the vise it can be
without using the "V" groove.
When the vise is removed it could be replaced by a thin sheet
that would be located in the vise pivot hole in the base and
clamped using the vise bolt and square nut. The first
saw was used it would cut a slot in the wood. If a
groove was cut
in the wood in a left to right direction, square to the blade,
small fence fitted it may be possible to cut printed circuit
boards. The blade center to the back of the throat is
little shorter to the red plastic safety stop.
These are telescoping brass tubes 0.3135 x 0.285 and 0.344 x
0.316 They both have 0.014" thick walls. Since the
pitch is 0.031459 I wanted to see how well it would cut these
and as you can see at the end of the cut there's a tag left on
that's cut off. The part in the vise has a clean
Notice that the tubes are still round and these two telescope
should. Other methods of cutting thin wall tube can
This seems to be a bargain and
reasonable job of cutting material. Both lower in cost
quality cuts than larger options.
Need to figure out a way to get square cuts and to add a stop
multiple parts can be cut to the same length.
Can this saw cut Printed Circuit
Boards, as is maybe by removing the vise and inserting
something, or by
removing the base and mounting the saw on a slide similar to a
arm saw, only at a fixed height and at 90 degrees to a
fence? Will the stock blade be ruined by cutting
The Proxxon Chop
Saw KGS 80
has similar functionality. It comes with a 24 tooth
blade i.e. 0.2" pitch, much coarser than the HF 100 tooth
They fit a 10 mm arbor which is 0.394"
that's 18 mills larger than 3/8" and so would be very out of
installed on this saw, unless a spacer ring was used.
For those who are cutting
larger diameter or harder to cut materials the small band saws
Harbor freight has the Portable Variable Speed Bandsaw 47840
for $70 (sale price). No bench stand included.
Grizzley has the G8692
Portable Bandsaw w/ Stand for $140 (regular price). Two
hold the saw to the stand so it can be used either way.
metal cutting bandsaw i.e. the largest rectangle that can be
cut is 4"
x 6" and a 4x6
The Harbor Freight 4x6 on sale 93762-6VGA
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