Pillar Drill Speed Reduction

[Maker]

I think most silver & deming come with three flats, I'm very surprised your 60 mm bit didn't.

 

[brightspark]

I think most silver & deming come with three flats, I'm very surprised your 60 mm bit didn't.

ihave a set of five and none of them have flats there ok if u just take cuts with smaller drills 1st then work your way up and even then they dont like it

 

[MrFluffy]

ihave a set of five and none of them have flats there ok if u just take cuts with smaller drills 1st then work your way up and even then they dont like it

brightspark, may I draw your attention to your posts in the thread titled "who needs a surface grinder anyway? "

 

[brightspark]

brightspark, may I draw your attention to your posts in the thread titled "who needs a surface grinder anyway? "

and a dividing head

 

[MrFluffy]

Nah, spindex, or I have a made up jig with a bendy bit of metal which indexes with the bendy finger against a existing flat I keep for doing drill sharpening which works in reverse

 

[MrFluffy]

kudos to the first person that realizes you cant use a index finger against two flats to generate 3 cornered shapes, and realizes my dirty secret that I eyeball surfaces 2 & 3 against a precut angle master

 

[outofthefire]

it wouldnt be worth the hassle of sourcing gears and making the fittings and countershaft ect to alter it for the odd large hole to be drilled .the cost of gears alone make it a non starter

Thats true but if your a hoarder like me and you've already got the bits kicking about ...

 

[Paul G]

I would look round for an old Sealey 16 speed. Mine was only £270 when new in 2001 so a s/h one wouldn't break the bank.
It's an MT3 so will take over an inch, and low speed is 140 rpm. It has drilled 1-1/2" , trepanned 3" in stainless, and tapped M20.

I've fitted a reverse switch and a secondary belt tension spring as big drills tend to make the drive slip. Payed for itself over and over.

I do have an MT2 Meddings as well thats set up with a 13mm chuck that does most of my work.

Paul G

 

[Psychosaffa]

Cheers, I don't want to part with it as it's a solid old beast. Will ask around for a set of back gears, but there is a better chance of politicians going legit than finding a set. Will keep an eye out for one of them sealy drills, but my workshop space is limited. What did you mean with reverse switch? Is it a 3ph drill?

 

[brightspark]

u can reverse a single phase drill but would u realy want to go to all the bother and expense [FOR WHAT }

 

[Paul G]

Cheers, I don't want to part with it as it's a solid old beast. Will ask around for a set of back gears, but there is a better chance of politicians going legit than finding a set. Will keep an eye out for one of them sealy drills, but my workshop space is limited. What did you mean with reverse switch? Is it a 3ph drill?

No, just a single. The switch is a handy addition when tapping, and for around £8 I can't think of a better value item.

Paul G

 

[Mr shiney]

Do you have a link to a supplier for that? It's a great idea!!

 

[brightspark]

8 quid off ebay from china

 

[ukracer]

No, just a single. The switch is a handy addition when tapping, and for around £8 I can't think of a better value item.

Paul G
View attachment 57690

Where do you get a reverse switch for 8 quid??

 

[ukracer]

8 quid off ebay from china

wow you replied before I asked...lol


7 quid now. http://www.ebay.co.uk/itm/15-Amp-Dr...al_Components_Supplies_ET&hash=item53ff20aa94

Ah the 8 quid one is 60 amps.

 

[brightspark]

there verry flimsy and cheap but adequate for up to 1hp have fun altering your wiring in the motor and working the switching out in the reversing drum cos theres no instructions with them easy to work out when u can test with meter though i only use mine for on or off . i just hand crank the spindle if i want reverse u have more controll and can use it for tapping threads

 

[Mr shiney]

I have a reversing switch on my Myford. I quite like it for tapping. Be handy for the pillar drill.

 

[Psychosaffa]

not that it makes any difference, but according to the large metalbadge ont he frill its a Kerry Drillmaster and not a super 8

 

[KemppiFrog]

Needed to cut 50mm holes in 6mm SS plate with hole saws. To get the RPM down on my Meddings, I piggybacked a 1hp motor behind the existing one on a frame and ran the belt to the upper big pulley on the original motor, while using the smallest pulley to run the chuck shaft. So halved all the speeds. Liked it so much, it is still like that 16yrs later Cost nothing, as I had the extra motor in the shed, complete with pulley.
KF

 

[brightspark]

sounds interesting but use the smallest pulley on the final chuck shaft ??surely the largest ?to slow it and more surface aeria on the pulley to stop slip