Kennedy Mini Power Hacksaw

Si Titor

Si Titor

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Kennedy Hexacut mini power hacksaw that will take standard hacksaw blades.

Picked it up last week, cleaned it up lubricated it etc, works a treat!
Just filled up the dashpot with Castrol EP90 oil before I took the video.


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I have one under the bench not used it for close on 25 years. The 2 sliders wore badly and I think it cuts about 5 degree off the square. Was going to put it on the miller and refurbish it but bought a horizontal/vertical bandsaw to tide me over and that has done so well that I never bothered with the Kennedy.
Keep your sliders well lubricated , wire rope/chain lube is ideal. Better than most mineral oils
 
I was lucky to find one of these old Kennedy saw's in good condition. Even though it had the original motor, the reciprical action just seems to be a little too fast for my liking, and there's no realistic way to reduce it. The nice guy I bought it from was retiring, and gave me a tray full of electrically related tools along with it. :)
PICT0009 (Medium).webp
 
Gap-Shot said:
I was lucky to find one of these old Kennedy saw's in good condition. Even though it had the original motor, the reciprical action just seems to be a little too fast for my liking, and there's no realistic way to reduce it. The nice guy I bought it from was retiring, and gave me a tray full of electrically related tools along with it. :)View attachment 775440
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Could you not install a rheostat, in line, to reduce rpm ?
 
If a motor has brushes (DC or AC) it can be controlled by reducing the supply voltage. Yes a rheostat would do it as was done in theatres of old, but they were running a very stable and predictable load - light-bulbs. A motor in a tool will have to drive a varying load and still hold the selected speed. To slow it down and yet still provide torque when asked the supply voltage can be reduced with a transformer, or made variable with a special transformer with a variable output - a Variac. Obviously at lower voltage/speed the max torque available will be similarly lower.

An AC induction-type motor's speed can only be realistically controlled by changing the AC frequency (unless the load is very predictable and constant - a desk fan). The motor on the saw looks like an AC induction job.
 
Antos' said:
If a motor has brushes (DC or AC) it can be controlled by reducing the supply voltage. Yes a rheostat would do it as was done in theatres of old, but they were running a very stable and predictable load - light-bulbs. A motor in a tool will have to drive a varying load and still hold the selected speed. To slow it down and yet still provide torque when asked the supply voltage can be reduced with a transformer, or made variable with a special transformer with a variable output - a Variac. Obviously at lower voltage/speed the max torque available will be similarly lower.

An AC induction-type motor's speed can only be realistically controlled by changing the AC frequency (unless the load is very predictable and constant - a desk fan). The motor on the saw looks like an AC induction job.
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Just wondering - my benchtop band saw has a variable speed control, which I believe is a rheostat. 110- 120/V AC.
 
chouchin66 said:
Just wondering - my benchtop band saw has a variable speed control, which I believe is a rheostat. 110- 120/V AC.
Click to expand...
Could be a phase-angle control - a domestic light dimmer is such. I had a small bench pcb drill using that idea but yes it slowed down under load. Thinking about it, my Bosch hand-drill has phase-angle too, built into the trigger movement. Very handy but it slows down on load - If I need slow with torque I cheat, running it at full trigger but off a variac in an extension lead.

Being a nerd can be useful sometimes.
 
Looking at the size of the pulley cover, there doesn't look like there's much scope for altering pulley size - smaller drive and/or larger driven ........ both look at about the limit.
Not up on electrics but.......... If it's a 2 pole motor, a 4 pole motor would halve the speed Shrug tt
 
Si Titor said:
Kennedy Hexacut mini power hacksaw that will take standard hacksaw blades.

Picked it up last week, cleaned it up lubricated it etc, works a treat!
Just filled up the dashpot with Castrol EP90 oil before I took the video.


View attachment 774994

View attachment 774995


View attachment 774996
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That's a nice machine,i knew an oldschool upholsterer who had one of these in his workshop,he did machine work as a hobby,he specialised in restoring vintage car interiors & horse drawn cart seats etc,his work was absolutely outstanding,i tried to buy the hacksaw from him a few times but he wouldn't part with it,he's sadly long gone now & i've no idea where his tools would have went.

If you ever feel inclined to part with this give me a shout (y)
 
Zed1 said:
That's a nice machine,i knew an oldschool upholsterer who had one of these in his workshop,he did machine work as a hobby,he specialised in restoring vintage car interiors & horse drawn cart seats etc,his work was absolutely outstanding,i tried to buy the hacksaw from him a few times but he wouldn't part with it,he's sadly long gone now & i've no idea where his tools would have went.

If you ever feel inclined to part with this give me a shout (y)
Click to expand...
You see them on ebay now and then and some with postage, but often or not they are collection only.
 
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