Reciprocating Linear Actuator Holder

Kitchen Knife Forums

Help Support Kitchen Knife Forums:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
mengwong

mengwong

KKF Supporting Member
Joined
May 26, 2021
Messages
2,214
Reaction score
6,897
Location
Singapore
Last edited:
mengwong said:


What if we hooked this up to a stone holder? Mounted to slide rails.

That gives us a powered sharpening stone setup. Like a horizontal sharpening wheel but linear.

Has this been tried before?

Slide rails:
https://amzn.asia/d/7T225De
Click to expand...

The only time I’ve seen such a thing (suitably accessorized) was in adult vids …

On a more relevant note, the difficult engineering would be in a fixture that holds the knife at the correct pitch angle and adjusts its roll angle to the curve of the blade while maintaining the selected downforce on the stone. And moves the contact area from heel to tip.

Unless you’re thinking of manually holding the blade and doing the complex things while the stone goes wacka wacka under your hands.
 
Last edited:
Oh, for sure. I’m the fixture!

I thought it’d be easier because all I have to do is lean down and manage angle, without having to orchestrate the scrubbing and the “lock the wrist” at the same time.

Mostly though I was thinking of this in the context of the other threads which want power tools but lack wherewithal or the taste for a bench grinder.

This way you could go low grit, you could polish, you could do more a day before fatigue.
 
mengwong said:


What if we hooked this up to a stone holder? Mounted to slide rails.

That gives us a powered sharpening stone setup. Like a horizontal sharpening wheel but linear.

Has this been tried before?

Slide rails:
https://amzn.asia/d/7T225De

M8 backplate for attaching actuator rod end to stone holder
https://www.bes.co.uk/backplate-m8-m10-female-stainless-steel-16762/

T-connector? Bolt to slide rail
https://www.metrohm.com/en/products/6/1808/61808070.html
Click to expand...

A new item for yourself AND your store @ethompson. @KasumiJLA would probably want this also.

😂😂😂😂
 
Sharp Pebble Premium Whetstone Knife Sharpening Stone 2 Side Grit 1000/6000 Waterstone- Whetstone Knife Sharpener- NonSlip Bamboo Base & Angle Guide
$42.99
Sharp Pebble Premium Whetstone Knife Sharpening Stone 2 Side Grit 1000/6000 Waterstone- Whetstone Knife Sharpener- NonSlip Bamboo Base & Angle Guide MIGHTY DREAMS
MIDO PROFESSIONAL ABRASIVE Knife Sharpening Stone 400/1000 Whetstone Sharpening Stone with Non-Slip Rubber Base for Kitchen, Hunting, and Pocket Knives or Blades
$9.99
MIDO PROFESSIONAL ABRASIVE Knife Sharpening Stone 400/1000 Whetstone Sharpening Stone with Non-Slip Rubber Base for Kitchen, Hunting, and Pocket Knives or Blades miduguoji
Astercook Knife Set, Kitchen Knife Set with Built-in Sharpener Block, Dishwasher Safe, 15 Pieces German Stainless Steel Knife Block Set, Black
-20%
$39.99 $49.99
Astercook Knife Set, Kitchen Knife Set with Built-in Sharpener Block, Dishwasher Safe, 15 Pieces German Stainless Steel Knife Block Set, Black Astercook
Knife Sharpening Stone Kit, KERYE Professional Japanese Whetstone Sharpener Stone Set, Premium 4 Side Grit 400/1000 3000/8000 Water Stone, Flattening Stone, Angle Guide, Leather Strop, Anti Cut Gloves
$32.84
Knife Sharpening Stone Kit, KERYE Professional Japanese Whetstone Sharpener Stone Set, Premium 4 Side Grit 400/1000 3000/8000 Water Stone, Flattening Stone, Angle Guide, Leather Strop, Anti Cut Gloves Sakai Heritage
Knife Set with Block for Kitchen - 7Pcs Hand-Forged Kitchen Knife and Magnetic Holder with Ergonomic Handle-Perfect for Novice to Professional Chefs.
-19%
$129.99 $159.99
Knife Set with Block for Kitchen - 7Pcs Hand-Forged Kitchen Knife and Magnetic Holder with Ergonomic Handle-Perfect for Novice to Professional Chefs. LXSEREY STORE
Knife Set with Block, N NOBLE FAMILY 16Pcs Kitchen Knives Drawer Organizer Set with Sharpener, Cutting Board, Anti-Slip Chef Knives Set with 6Pcs Steak Knives, Black
-23%
$99.99 $129.99
Knife Set with Block, N NOBLE FAMILY 16Pcs Kitchen Knives Drawer Organizer Set with Sharpener, Cutting Board, Anti-Slip Chef Knives Set with 6Pcs Steak Knives, Black Jianyamei
THRWCLUB Axe Sharpener 400/1000 Grit - Hatchet/Axe Sharpening Stone, Axe Blade Sharpener, Sharpening Puck, Lansky Puck, Dual Grit Multi-Purpose Hatchet Sharpening Tool with Leather Sheath
$9.99
THRWCLUB Axe Sharpener 400/1000 Grit - Hatchet/Axe Sharpening Stone, Axe Blade Sharpener, Sharpening Puck, Lansky Puck, Dual Grit Multi-Purpose Hatchet Sharpening Tool with Leather Sheath IEXPO
zongchuan 5 PCS Damascus Chef Knife Set, Ultra-Smooth Cutting Experience and Professional Grade Sharp, Kitchen Knife Set,Handle Ergonomic Design,9CR18MOV High Carbon Stainless Steel,Dishwasher Safe
-33%
$51.10 $76.79
zongchuan 5 PCS Damascus Chef Knife Set, Ultra-Smooth Cutting Experience and Professional Grade Sharp, Kitchen Knife Set,Handle Ergonomic Design,9CR18MOV High Carbon Stainless Steel,Dishwasher Safe ZongChuan Official Store
BRODARK Kitchen Knife Set with Block, Full Tang 15 Pcs Professional Chef Knife Set with Knife Sharpener, Food Grade German Stainless Steel Knife Block Set, Christmas Gifts, Steel-king Series
-25%
$88.98 $118.00
BRODARK Kitchen Knife Set with Block, Full Tang 15 Pcs Professional Chef Knife Set with Knife Sharpener, Food Grade German Stainless Steel Knife Block Set, Christmas Gifts, Steel-king Series Brodark Store
Angerstone Portable Whetstone Knife Sharpening Stone - Outdoor Hunting Knife Sharpener Stone Kit Dual Grit 400/1000 - Pocket Sharpening Stones for Knives with Cowhide Pouch for Bushcraft Camping Field
-7%
$13.99 $14.99
Angerstone Portable Whetstone Knife Sharpening Stone - Outdoor Hunting Knife Sharpener Stone Kit Dual Grit 400/1000 - Pocket Sharpening Stones for Knives with Cowhide Pouch for Bushcraft Camping Field Crazy Potato
Angerstone Axe Sharpener - 3.8”Oversized Axe/Hatchet Sharpening Stone - Whetstone Blade & Tool Sharpener, Dual Grit 180/320 Sharpening Puck with cowhide Sheath for Bushcraft, Camping and Field Use
$15.99
Angerstone Axe Sharpener - 3.8”Oversized Axe/Hatchet Sharpening Stone - Whetstone Blade & Tool Sharpener, Dual Grit 180/320 Sharpening Puck with cowhide Sheath for Bushcraft, Camping and Field Use Crazy Potato
Dfito Chef Knife Sets with Roll Bag, 9 Pieces Professional Knife Set, High Carbon Stainless Steel Kitchen Chef Knife Set, Red Pakkawood Handle, Dishwasher Safe
$99.99
Dfito Chef Knife Sets with Roll Bag, 9 Pieces Professional Knife Set, High Carbon Stainless Steel Kitchen Chef Knife Set, Red Pakkawood Handle, Dishwasher Safe Dfito Direct
Knife Sharpening Stone - Dual Grit Whetstone 400/1000 3000/8000, Knife Sharpening Stone Set, Tpstone Knife Sharpener Tool,Easy to Use
$25.99
Knife Sharpening Stone - Dual Grit Whetstone 400/1000 3000/8000, Knife Sharpening Stone Set, Tpstone Knife Sharpener Tool,Easy to Use TPstone choice
MOSFiATA Kitchen Knife Set, 12 Pcs Japanese Stainless Steel Knife Sets for Kitchen with Oxford cloth storage bag with Knife Sharpening Rod, Dishwasher Safe, For Outdoor
$79.99
MOSFiATA Kitchen Knife Set, 12 Pcs Japanese Stainless Steel Knife Sets for Kitchen with Oxford cloth storage bag with Knife Sharpening Rod, Dishwasher Safe, For Outdoor iHome888
Knife Set, 15 Pieces Kitchen Knife Set with Built in Sharpener, German High Carbon Stainless Steel Knife Block Set, Dishwasher Safe, Black
$79.99
Knife Set, 15 Pieces Kitchen Knife Set with Built in Sharpener, German High Carbon Stainless Steel Knife Block Set, Dishwasher Safe, Black Amorston Offical
Intelitopia Complete Knife Sharpening Stone Set – Dual Grit Whetstone 400/1000 3000/8000 Knife Sharpener with Leather Strop, Flattening Stone, Bamboo Base, 3 Non-slip Rubber Bases & Angle Guide
-21%
$26.99 $33.99
Intelitopia Complete Knife Sharpening Stone Set – Dual Grit Whetstone 400/1000 3000/8000 Knife Sharpener with Leather Strop, Flattening Stone, Bamboo Base, 3 Non-slip Rubber Bases & Angle Guide keepooon
HENCKELS Razor-Sharp 20-Piece Statement Knife Set with Block, With Bonus Sharpener, German Engineered Knife Informed by over 100 Years of Masterful Knife Making
$199.95
HENCKELS Razor-Sharp 20-Piece Statement Knife Set with Block, With Bonus Sharpener, German Engineered Knife Informed by over 100 Years of Masterful Knife Making Knife Aid, Inc.
Piklohas Kitchen Knife Sets for Kitchen with Block, 17 Pieces with Magnetic Knife Holder, German High Carbon Stainless Steel Damascus Pattern Chef Knives Set with Sharpener, Steak Knives
-16%
$159.98 $189.99
Piklohas Kitchen Knife Sets for Kitchen with Block, 17 Pieces with Magnetic Knife Holder, German High Carbon Stainless Steel Damascus Pattern Chef Knives Set with Sharpener, Steak Knives Piklohas Kitchen
HiramWare Knife Sharpening Stone with Non-slip Rubber Base, 400/1000 Grit Premium Whetstone, Double-Sided Knife Sharpener for Kitchen, Waterstone for Honing Blades Manually
$9.99
HiramWare Knife Sharpening Stone with Non-slip Rubber Base, 400/1000 Grit Premium Whetstone, Double-Sided Knife Sharpener for Kitchen, Waterstone for Honing Blades Manually Hiram Deals
YeopAsda Knife Sharpening Stone Set - Premium 4 Side Grit 400/1000 3000/8000 Whetstone Sharpener Kit - Non-Slip Bamboo Base,Cut Resistant Gloves, Angle Guide,Flatting Stone,Honing Guide,Leather Strop
$39.99
YeopAsda Knife Sharpening Stone Set - Premium 4 Side Grit 400/1000 3000/8000 Whetstone Sharpener Kit - Non-Slip Bamboo Base,Cut Resistant Gloves, Angle Guide,Flatting Stone,Honing Guide,Leather Strop YeopAsda
Recording project progress

IMG_0659.jpeg


The slide rails look just the right size for my Naniwa stone holder

IMG_0660.jpeg


Attaching the M8 rod end from the motor (not yet arrived) to the stone holder could potentially be as simple as these EZ Lok threaded inserts, which are sold for wood and for plastic.


IMG_0661.jpeg


My buddy with a 3D printer could potentiallly fab a plastic shield to keep the slurry off the rails themselves, don’t want to gunk up the precision ball bearings.



Quieter than a belt grinder.
 
Last edited:
While the motion makes the eternal 13 year old in me giggle, that actually does look like a super useful tool for people who love stones, especially the polishers. Seems like it would very much be a game changer so long as it’s max speed is higher than people normally move at when polishing
 
I've been thinking about doing this exact project, I just didn't know the funny machine was actually called the "reciprocating linear actuator." Excited to see how this goes! Only having to use your bodyweight instead of scrubbing back and forth for probably 7 years would be a dream come true.
 
can't wait to see you crank up the speed
 
lol, I’m feeling the temptation to codename v1 of this device the “Papa”

I’m building a sketch of the M8 rod adapter and splash guard for 3D printing, will update when more progress occurs
 
Detail shots
IMG_1658.jpeg
IMG_1663.jpeg
IMG_1733.jpeg


Most of this assembly was courtesy of these two burly men from a local carpentry firm. The design was done by the account manager lead.
IMG_1664.jpeg


They were here for home reno work but everybody got interested in my side project. They fabbed the wood and drilled out the holes and screwed all the bits together with astonishing speed. You could tell these guys went into carpentry because they loved working with wood and with their hands. It was fun for them, I think. I don’t know if they’re going to bill me or if they have all quietly agreed amongst themselves to do the work for free as a favour from one middle aged engineer-type to another. I suspect if I had tried to tip them they would have refused. I hope that’s true.
 
Last edited:
You must log in or register to reply here.

Latest posts

Back
Top