New Hapstone M2 knife sharpener

Gritomatic

Gritomatic

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Jan 4, 2016
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Hapstone M2 is the new middle-stream knife sharpener from Hapstone, the supplier of successful Hapstone V7. Focusing on what matters most for knife sharpening enthusiasts, Hapstone M2 is a combination of precision, durability and great value.

Hapstone-knife-sharpener-M2-0.gif

Features
  • New Vertical Blade Support for knives which don't stand still on the sharpener working surface
  • New Pivot unit with the full 360° rotation
  • Anodized coating for extra durability
  • Full compatibility with Edge Pro format stones
  • Universal stone holder
  • Suitable for sharpening stones up to 6" (150 mm)
  • Any sharpening angle in a range from 8° to 45° degrees
  • All basic parts including thumbs are made of metal
  • Three-Point Guide for a high-precision knife positioning
  • Light-alloy horizontal shaft for better pressure control during the sharpening process
  • Strong neodymium magnets to facilitate knife fastening
  • Rubber coated supporting legs that can be used on any surface
  • Instant assembly
  • Parking hook for horizontal shaft
  • Metal pivot unit with PTFE insert provides smooth shaft movement and requires no lubrication or cleaning
  • Wooden handle to make time-consuming work a little easier
  • Heavy unit (5.4 lbs) does not require clamping to a table.
These specifications enable Hapstone to deliver an affordable high-precision knife sharpener to the market.

Warranty
The manufacturer provides the 5-year warranty on Hapstone M2 knife sharpeners. You can be sure of the reliability of the devices and support from the manufacturer for the entire period of use.

Gritomatic handles warranty support for Hapstone sharpeners in the USA.

Where to buy
Hapstone M2 is available to buy today.

Gritomatic
Base price $149 / free 3-day US shipping
Other stone bundles available
Amazon
Price $159 / Prime

Options
Optional accessories available to buy today:
Convex rod $75
Thickness compensator $13
Guide rod for Wicked Edge stones $15
 
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Ok, I purchased a Hapstone M2. It's an improvement over my edgepro but @ $150, I expected more.

I really like the magnetic aspect, that in itself is almost worth it. Yet, the novelty wore off quick when the inexpensive PLASTIC bushing on the stone rod would randomly bind. Really, plastic bushing on $150 unit? Fortunately Amazon had two linear ball bearing (with seals)for $10 - smooth now. My second "fix" is a travel limiter that will keep the 6"stone from falling off the blade edge on return - piece of precision cut foam and washer.

Now that it's been "fixed" works like a charm.
 
mk2vt said:
Ok, I purchased a Hapstone M2. It's an improvement over my edgepro but @ $150, I expected more.

I really like the magnetic aspect, that in itself is almost worth it. Yet, the novelty wore off quick when the inexpensive PLASTIC bushing on the stone rod would randomly bind. Really, plastic bushing on $150 unit? Fortunately Amazon had two linear ball bearing (with seals)for $10 - smooth now. My second "fix" is a travel limiter that will keep the 6"stone from falling off the blade edge on return - piece of precision cut foam and washer.

Now that it's been "fixed" works like a charm.
Click to expand...

After "upgrading" $170 device to $150 device, you got a dozen of improvements. Of course, 2 more would be better :) The improvements you've made are perfect. We are working in the same direction.
The linear bearing was never used in serial knife sharpeners (AFAIK). Fault rate, dust accumulation, and friction force were our concerns. Plastic bushing is not so bad - the friction force of PFTE-metal is the lowest among all materials, the fault rate could be the issue only in very heavy duty mode. (Plastic is more the problem of emotions). The linear bearing is the weird thing, honestly. The friction force is low and constant during the movement. When you start a stroke using the plastic pivot, it's totally different. When you make short strokes, linear bearing is the winner. When you make long strokes, it's easier to deal with plastic. Besides this, linear bearing has a little bit of tremor.
Anyway, we believe the linear bearing is the next big thing. And I have no doubt many customers will HATE it. We plan to use the linear bearing in R1, in the new revision of M2 (at the end of spring), and U-pivot (we call it "Fork") upgrade for V7 (no release date).
 
Used the existing hole as a pilot for 15/32 drill. Put a spacer in the center (1/4 hose) this will move the mounting flange out to ensure the pivot is free - or simply cut the flanges off.

Single lip seals on both end of the bearing should be sufficient for a while.

FWIW, the edgepro as many years old -

40154926583_0ba1ef4a3f_k.jpg
 
mk2vt said:
Ok, I purchased a Hapstone M2. It's an improvement over my edgepro but @ $150, I expected more
Click to expand...
I own an edge pro, kme, ws ko, and an m2 as well as various bench stones and a sharpmaker. I don't share your opinion in the least about the price.
 
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That's the beauty of the internet - all opinions. The M2 works. I really like the magnetic hold setup, it removes bladed placement variability when flipping the bladed over which i struggled with on the EP.

It was the stiction that soured the experience. Pretty sure with time, it would have gone away. Reality is, the EP does not have a bearing at all, at least mine does not.

IMO, the sharpeners in general are overpriced based on BOM, it's clear people (myself included) are will to pay for the "IP" value.
Look at the EP knockoff selling for $30.

I did go look at the edgepro on Amazon, $165(wow). IMO, the Hapstone M2 is a better value in comparison to the EP if buying new.

The fact the M2 is metal is a plus as it easily modified.

I added the linear bearing, soft stops for stone travel.
Next will be improving the stone holder. The stones (EP) do not lock as the holder has insufficient angle. Will either add a space to lift the Al block up or file a chamfer in the block.

These are my opinions based on my application usage -
 
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mk2vt said:
Ok, I purchased a Hapstone M2. It's an improvement over my edgepro but @ $150, I expected more.

I really like the magnetic aspect, that in itself is almost worth it. Yet, the novelty wore off quick when the inexpensive PLASTIC bushing on the stone rod would randomly bind. Really, plastic bushing on $150 unit? Fortunately Amazon had two linear ball bearing (with seals)for $10 - smooth now. My second "fix" is a travel limiter that will keep the 6"stone from falling off the blade edge on return - piece of precision cut foam and washer.

Now that it's been "fixed" works like a charm.
Click to expand...


Did a few knives tonight on the M2. First thing I noticed was how hard it was to push the rod.. it was free floating and easy then it got really stubborn. The second problem I noticed was being able to over pull and push the stone edge in to the blade... I found this with in 5 minutes of using this product. How did anyone at the manufacturer miss it? I really like it, but I'm not going to fiddle with it, think I'll send it back and stick to my KME.
 
No1up said:
Did a few knives tonight on the M2. First thing I noticed was how hard it was to push the rod.. it was free floating and easy then it got really stubborn. The second problem I noticed was being able to over pull and push the stone edge in to the blade... I found this with in 5 minutes of using this product. How did anyone at the manufacturer miss it? I really like it, but I'm not going to fiddle with it, think I'll send it back and stick to my KME.
Click to expand...
I don't have either of those issues. Are you using light pressure. Your not trying to grind the apex, just sharpen the apex.
 
The rod in and out motion is not smooth. There's a lot of resistance. Tried a small knife and it was nearly impossible. The knife is a 3" blade.
 
No1up said:
The rod in and out motion is not smooth. There's a lot of resistance. Tried a small knife and it was nearly impossible. The knife is a 3" blade.
Click to expand...
Zero issues here. I got one from the kickstarter. Have you tried a drop of mineral oil on the rod? May help.
 
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