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Forum topic by trevor7428 posted 12-02-2017 05:40 AM 993 views 0 times favorited 18 replies Add to Favorites Watch
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trevor7428

266 posts in 1043 days


12-02-2017 05:40 AM

Topic tags/keywords: question jig

I made my drill press table out of 2 layers of 3/4” MDF with white laminate over all sides and Rocklers fence. The whole table ended up pretty big, but had to be big because my drill press chuck can go back and forth (straight back/ towards you) Approx 10”.

Anyways, when lowering the table it will jump down about 1/2” everytime I turn the crank a couple times. Does this happen with all big/ heavy tables or is my drill press just a piece of junk?

-- Thank You Trevor OBrion


18 replies so far

View TheFridge's profile

TheFridge

9856 posts in 1568 days


#1 posted 12-02-2017 05:43 AM

It’s sticking. Clean the column and wax it. Has always worked for me and protects it as well.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View pottz's profile

pottz

2858 posts in 1066 days


#2 posted 12-03-2017 02:02 AM



It s sticking. Clean the column and wax it. Has always worked for me and protects it as well.

- TheFridge

I think fridge hit it on the head,its sticking,just clean it well and lube and you should be fine,if not its probably crap-lol.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View Richard Lee's profile

Richard Lee

139 posts in 857 days


#3 posted 12-03-2017 03:01 AM

Mine does the same regardless of lube and how clean the column is, I just push lightly with one hand and crank with the other.

View AlaskaGuy's profile

AlaskaGuy

4269 posts in 2391 days


#4 posted 12-03-2017 06:36 AM

I think you have a gravity problem. If you stand the dill upright gravity will work better when sliding the table down.

-- Alaskan's for Global warming!

View TheFridge's profile

TheFridge

9856 posts in 1568 days


#5 posted 12-03-2017 07:28 AM

On second thought. I see it’s a HF brand which isn’t known for its machining. I’d pull it apart with use some 400-600ish grit sandpaper to deburr the column and inside the knuckle then wax it.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View Richard Lee's profile

Richard Lee

139 posts in 857 days


#6 posted 12-03-2017 04:06 PM

The extra weight on the table is acting like a lever.
Be willing to bet if you picked up the front of the table a bit by hand it would work fine.

View Knockonit's profile

Knockonit

420 posts in 284 days


#7 posted 12-03-2017 09:52 PM

Yep, hit that one outta the park, i have basically same thing, made it years ago, when i have the big table on it, up and down is like being in a car someone is learning to drive a stick, jerkly lurky, i sanded, waxed, oiled and cussed, still does it, lifting on front of table relieves some of the bind, but still jerks. I just learned to live with it.


The extra weight on the table is acting like a lever.
Be willing to bet if you picked up the front of the table a bit by hand it would work fine.

- Richard Lee


View LittleShaver's profile

LittleShaver

346 posts in 701 days


#8 posted 12-04-2017 07:11 PM

My PC does the same thing even without a heavy table. Lifting the front edge helps, but I usually drop below the desired height and crank back up.

-- Sawdust Maker

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HorizontalMike

7769 posts in 2996 days


#9 posted 12-04-2017 07:18 PM

My 20in. Grizzly does just fine with the DP table attached. Just have to remember to “unlock” the position before cranking, and then all is well. I wax the pole, but have not found it necessary to wax/lube the threaded shaft or crank.

-- HorizontalMike -- "Woodpeckers understand..."

View Annia Palmer's profile

Annia Palmer

16 posts in 251 days


#10 posted 12-23-2017 04:51 AM

I really appreciate you. Good Job trevor7428…

I put in a 1-1/4” Forstner bit on this 12” drill press. Then I proved it out on a very dried 2×4 pine. The drill’s spindle got stuck, then stop all the time. I can’t make a smooth drill each time. It appears that this drill’s motor is lack of power. Anybody has the tantamount experience?

-- Annia Palmer

View Tennessee's profile

Tennessee

2876 posts in 2596 days


#11 posted 12-23-2017 01:21 PM

Annia – I would bet your belt is slipping, not your motor stalling out.
Try tightening your belt. There should be a way to move the motor back, which will tighten the belt, or possibly a third pully in the head that keeps the belt tight can be tightened.

-- Tsunami Guitars and Custom Woodworking, Cleveland, TN

View John Smith's profile

John Smith

1241 posts in 244 days


#12 posted 12-23-2017 03:04 PM

Trevor Said: when lowering the table, it will jump down about 1/2”
everytime I turn the crank a couple times. Does this happen with all big/ heavy tables

in my opinion – yes it does ….. unless you have some kind of spring assist, which is rare.
the cast iron table on my press is probably a little more than your MDF table and I
had the same problem – at first.

I lowered the table all the way down. put a 4” wire brush in the cordless drill and
brushed the toothed rail until it was shiny and free of all debris. cleaned the back side
of the rail. induced fresh machine oil into the little ball port on top of the handle mechanism.
slowly worked the table up and down up and down up and down to get fresh oil into the
handle gears…... that alone made a vast improvement in raising and lowering the table.
but as said above – you are fighting gravity without a spring assist. so you must help it
with your body support – don’t just rely on the handle and gears alone.
cleaning the track and oiling the gears really helped. cleaning all rust off the pole with a sander
and wire brush helped a lot also.
as for loosing power: one belt was worn badly and the motor was slowly dying.
a new belt, new HF motor and a thoroughly cleaning made a huge improvement.

the motor was dying a slow death when I bought it.
now, with a new HF motor and two new belts, it has plenty of power, does not hesitate in hardwoods.
I am not saying go buy a new motor – just saying that was one of my problems in the power arena.
good luck !!
and if you have the plastic turn wheels, you may want to upgrade to all metal. (ebay=$16.00).

and on a safety note: once you get it all cleaned up and mechanical power and torque is restored,
you MUST HAVE a “drill press vice” bolted to the table when drilling small hardwoods and metal parts.
when (not IF) a part gets snagged on the drill bit – it can inflict great bodily harm, injury and possible
blindness in an instant. practice practice practice shutting your motor off in case of emergency.
when your fingers are wrapped around a spinning drill bit is not the time to “try to find” the OFF button.

.

-- Graduated Valedictorian from the University of HardKnocks --

View John Smith's profile

John Smith

1241 posts in 244 days


#13 posted 12-29-2017 12:00 AM

Trevor – as mentioned above about the “spring assist” option.

yesterday while at my Big Box Store, I picked up a hefty 16” spring
and put it on my drill press between the motor mount and the table locking pin.
it goes up with a little less effort, but when I let it down, it still drops about half an inch
with a “thunk” just as yours. so I am thinking that the worm gear in the lifting handle is worn out
or out of adjustment and allows this to happen. the only recourse is to belly-up and manually
assist the up and down adjustments.
- or – lay the drill press down on its side and remove the table and inspect the lifting worm gear.
which in my case would be fruitless as parts for my model are no longer available.
the other vintage Craftsman floor press I had did not have a gear rail or lifting handle.
it was strictly manual . . . . so – back to basics, as they say.
anyway – that would be your last option. if you have the time and energy to take it on.
good luck !!

.

-- Graduated Valedictorian from the University of HardKnocks --

View Alex Lane's profile

Alex Lane

511 posts in 3972 days


#14 posted 12-29-2017 02:38 AM

Maybe tighten the table locking screw just barely enough to prevent the table from dropping as it does. Then you’ll effectively be using the worm gear to crank the table down against the friction between the clamp and the column, instead of totally relying on gravity to pull the table down. As you crank, you might see the straight gear raise up until it hits the casting on top of the column, but then it should force the table down more smoothly.

The table might be acting similar to how the clutch mechanism of a pipe clamp locks onto the pipe. When you change the angle of the clutch plates, the clamp slides freely. I think the drill press table has just enough angle (and/or dirt/rust/grime) to act like the pipe clamp clutch plates and catch the column until the gears make enough force to make the table jump down. By lightly snugging the locking screw it might force the table to align better with the column and help avoid the jumping.

Another idea just popped up…
Attach a large extension spring between the base of the drill press and the table, causing constant downward force on the table, and maybe helping the table to lower more smoothly. Or am I just crazy? Bahahahahahahahahaaaa!
Hope my rambling helps, or at least makes it worse
:-P

-- Lane Custom Guitars and Basses

View TheFridge's profile

TheFridge

9856 posts in 1568 days


#15 posted 12-29-2017 03:43 AM



Yep, hit that one outta the park, i have basically same thing, made it years ago, when i have the big table on it, up and down is like being in a car someone is learning to drive a stick, jerkly lurky, i sanded, waxed, oiled and cussed, still does it, lifting on front of table relieves some of the bind, but still jerks. I just learned to live with it.

The extra weight on the table is acting like a lever.
Be willing to bet if you picked up the front of the table a bit by hand it would work fine.

- Richard Lee

- Knockonit

Maybe maybe not. It worked great for me.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

showing 1 through 15 of 18 replies

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