Jump to content

Drill bit sharpening machines


Recommended Posts

Morning all,

 I've been considering buying one of the cheap £30 ish machines such as a Parkside PSS 65 CI . Anyone got one or similar ? My main concern is how good is the result and how long do the diamond pads last?

It'll be for up to 13mm straight shank bits.

Steve

Link to comment
Share on other sites

Absolutely utterly worthless, in my experience. I have an identical one to that, only way to use it is without the attachments, put a zip tie over the safety switch, and freehand it. And even then it still sucks.

  • Like 1
Link to comment
Share on other sites

I'm no good at sharpening drill bits freehand, so I also gave in an bought one of the cheapish sharpeners. I hoped it would be easy and would help me keep the drill bits sharp by regular use. But it's always a lot of faffing about to get it to work and even then the results are marginal at best.

Link to comment
Share on other sites

Given I pay about a £1.80 for a 13mm drill bit, I wear them out and then bin them and get another from the box. Used properly a drill bit will drill an awful lot of holes before it needs sharpening.

  • Like 2
Link to comment
Share on other sites

19 minutes ago, robertspark said:

drill doctor and very happy with it for years.

A quick look on eblag shows only USA listings for this , I'll look further.

Thanks for the warnings about the cheap junkers failing to live up to the claims. That will be a no-go.

I've done pretty well for 40+ years using a bench grinder so maybe some better glasses or a workshop Holmes style magnifying glass on a stand would be better:D (and more light....hohum)

Steve

Link to comment
Share on other sites

The Drill Doctor XP is on offer at £109.95 free post and a spare wheel (30 usually) . Standard tip angle and split point.

This seems pretty reasonable maybe ? 

Which do you have @robertspark?  

Steve

 

Link to comment
Share on other sites

@steve b 500X

difference is just that the 500x will sharpen drills to 12" dia and 750x will sharpen up to 3/4".

if you but the 500x you can always buy another chuck and it will then do up to 3/4" drills

 

I like my cobalt bits as they tend not to be chocolate box drills when they are cobalt like some HSS ones that are more mild steel drill bits....

 

CHUCKS — Drill Doctor

don't be tempted to buy one from the US.... wrong voltage.

 

yes drills are a personal choice

The Difference Between HSS and Cobalt Drill Bits | R.D. Barrett (rdbarrett.co.uk)

M35 and M42 Cobalt Drill Bits: Differences, and Usage (drilladvice.com)

they tend to stay shaper for longer, but they don't like abuse.   They also are good at drilling plasma cut holes (much harder around the hole), better to dimple the holes and then drill them.

Link to comment
Share on other sites

 What's an inch or two between friends....

 

ok not many 12" drills I've seen and it like to see the battery drill on the end of that one...

 

12"=1/2".... only 11 1/2" out....

  • Haha 1
Link to comment
Share on other sites

1 hour ago, robertspark said:

@steve b 500X

difference is just that the 500x will sharpen drills to 12" dia and 750x will sharpen up to 3/4".

if you but the 500x you can always buy another chuck and it will then do up to 3/4" drills

 

I like my cobalt bits as they tend not to be chocolate box drills when they are cobalt like some HSS ones that are more mild steel drill bits....

 

CHUCKS — Drill Doctor

don't be tempted to buy one from the US.... wrong voltage.

 

yes drills are a personal choice

The Difference Between HSS and Cobalt Drill Bits | R.D. Barrett (rdbarrett.co.uk)

M35 and M42 Cobalt Drill Bits: Differences, and Usage (drilladvice.com)

they tend to stay shaper for longer, but they don't like abuse.   They also are good at drilling plasma cut holes (much harder around the hole), better to dimple the holes and then drill them.

Theres a bit of sale jargon In there... I have and do drill through a lot worse than Titanium with standard HSS bits.

  • Like 1
Link to comment
Share on other sites

For a bit more don't rule out the Chinese options like the MR-13D (no good at links but search in eBay will get you there, there are various very similar machines under different brand names), a bit more but once you get used to it you can very quickly sharpen a drill even if you are starting with one that has been snapped off and you can do a split point if you want it.

I have  the more expensive MR-G3 model which goes up to 32mm, the sharpener mechanism works well, the electric motors less so, had two burn out, the current one I am using the motor died so I ended up cutting the motor mechanism away and driving it with a belt from another generic motor and its worked fine ever since, the grinding disc's are mounted direct to the motor shaft so it was easiest to keep the centre shaft of the motor and just mount a cog on it.

How far you want to go depends on how many and how expensive the bits are, start buying bigger drill bits and they start getting expensive which justifies the sharpener, I sharpen the smaller ones as well but they probable wouldn't justify the cost unless you are using a lot of them.

I also have a BIG very old sharpener which goes up to 3" drill bits, so far used it on drills up to about 60mm, not quick on things that big but makes a very nice job of it, get two nice even cuts of swarf coming out in use, much better than I could ever get by hand. Look up the price of a 45mm drill and it will make your eyes water!. The bigger drills are used either in my Colchester Triumph 2000 lather or a friends Harrison M500 lathe.

Link to comment
Share on other sites

7 hours ago, robertspark said:

That's the sort I was talking about, I knew someone would sort out a link!, you will find plenty of other very similar ones listed as well, working on the same idea, generally around the same price and yep not cheap.

Just depends now many and now often you want to sharpen drill bits, its simple to use and sharpening a blunted 10mm bit is less than a minute, starting from one that has snapped and been cut off square about 5 minutes. I do my own bits as needed but often get handed boxes of other peoples bits to sort out as well. If you are only going through a few bits then just buying new ones each time is easier (or send them to me and I will sort them out).

I have the bigger model and its really on the 20-30mm bits range where it comes into its own as they are a lot more expensive to buy, for me the ability to sharpen smaller sizes was a very useful advantage but not the main reason to get it.

Link to comment
Share on other sites

On 5/6/2024 at 1:01 PM, vulcan bomber said:

Given I pay about a £1.80 for a 13mm drill bit, I wear them out and then bin them and get another from the box. Used properly a drill bit will drill an awful lot of holes before it needs sharpening.

^ this, £110 for a tool buys a lot of drill bits, I'm still working my way through a party pack of 1mm - 10mm in 0.5mm steps I bought from Axminster for around £50 many years ago, and every so often I'll pick up packs of 10 in a popular size from the creepy tool guy who turns up at shows etc. selling Presto and other good quality gear for cheap-ish. Using "disposable" 1/8 or 1/4 jobbers for pilot holes makes a huge difference, as does buying a few bits for "best" like the right sizes for all the taps that live with taps and don't get used for general stuff.

Link to comment
Share on other sites

For those that aren't aware of them (I am not responsible for any subsequent purchases) but if I'm drilling a fresh hole then I almost exclusively use these bad boys.

AA7C74A9-9B11-4BA8-A7FF-963CAD28E999-huge.thumb.jpg.9fc027f8de107ae049243e709be1bdb0.jpg

Dewalt Extreme 2 - self piloting up to 13mm. I.e. You don't need to start small and work up, just pick your hole size and have at it. I wouldn't necessarily use them on very thin stuff because they are monsters and tear through things very very quickly. For reference I timed a hole a while back for a friend to demonstrate it - <20s to put a 13mm hole into 20mm steel plate.

I haven't worn one out yet, snap them before then but two sets in 0.5mm increments has lasted me nearly 10 years and drilled a lot of holes in that time. They like running fast either with or without coolant (just don't add coolant part way through) but tend to grab as they come out the far side so there is a bit of a knack to slowing down the speed of cut as you punch through (that's usually where they snap).

Available from all the usual culprits, I think I paid about £75 for each set.

  • Like 2
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We use cookies to ensure you get the best experience. By using our website you agree to our Cookie Policy