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Drive wheels and Tensioners

4-Inch Rubber Wheel for the Deep Flat Platen

  • Deep flat platen attachment: D-shaped arm with platen plate, two wheels and square tool bar, shown for fit reference
  • 2-inch rubber flat-platen wheel on its side, tread and bearing showing, tape measure at left, shown for size comparison
  • 2-inch rubber flat-platen wheel standing bearing face up beside a tape measure for scale, shown for size comparison
  • Nova aluminum 2x72 grinder with flat-platen tool arm and abrasive belt, three-quarter view, shown for fit reference

4 shop photos · swipe or pick a thumbnail

$80

Available to ordermost orders ship in 7–10 business days

The 4-inch rubber wheel is the lower-wheel option I offer for the deep flat platen. Buy it on its own for your existing attachment or add it to a new platen order. Photo of the 4-inch wheel is on the way; shown here are the 2-inch wheel and the deep flat platen it fits.

Build your setup

Order the 4-inch rubber wheel

Pairs well withOptional

Bundle savings

Add a second piece and save 5% on both.

Quantity

$80 each

Your total
$80
  • Ships in 7–10 business days
  • 2-year warranty
  • Secure checkout by Stripe
5.0 on Google16 reviews (opens in a new tab)Returns reviewed within two weeks of arrival

  • Shipping

    $95 a grinder, $145 with a motor, $35 the first accessory — capped at $145. Tracking number emailed the day it ships.

  • Free local pickup

    1741 Industrial Drive Unit #8, Sterling, IL 61081. Email me to set a time, Mon–Fri 9:00am–4:00pm Central.

  • 2-year warranty

    Covers non-wear parts against defects in materials and workmanship under normal use.

  • Questions before you buy?

    Call or text 1-779-372-0262 or email me. You get the person who built it.

Google reviews

What owners say

Straight from Google, word for word. The ones about this kind of part come first.

5.0 on Google16 reviews (opens in a new tab)
  • 5 out of 5 stars

    Love the tracking system and the ratchet belt tensioning - makes changing belts quick and painless. All the controls just make sense.…

    Read the whole review by Eric TorrieShow the short version of Eric Torrie’s review

    Got this belt grinder for our farm shop and it's been awesome. The machining quality really impressed me - everything fits tight and feels solid, you can tell they put real care into making it.

    Setup took maybe 20 minutes tops and it was ready to roll. Runs super smooth and quiet with basically no vibration. Even though it's aluminum, there's zero flex or rattling - feels rock solid even when you're really putting it to work.

    Love the tracking system and the ratchet belt tensioning - makes changing belts quick and painless. All the controls just make sense.

    But honestly, what made this purchase special was dealing with Rich. He was incredible - answered all my questions before I bought it, made sure I got the right setup, and followed up several times after it arrived to check how everything was running. You just don't get that kind of service anymore.

    First belt grinder we've owned and I'm really happy with it. Thing's built to last and performs great. Would definitely recommend it if you're looking for a solid grinder for your shop.

    Keep up the fantastic work Rich!

    Eric TorrieGoogle review by Eric Torrie (opens in a new tab)
  • 5 out of 5 stars

    The ratchet tensioning is awesome.…

    Read the whole review by aaron emmerichShow the short version of aaron emmerich’s review

    I am unbelievably impressed with my Torus grinder. The machining is immaculate and tolerances are crazy for a grinder. It tracks perfectly. I bought this sight unseen and was a little bit concerned that aluminum wouldn’t be as rigid and that the weight of the aluminum would make it not a sturdy. I have used TW 90s, brodbeck, ameribrade, Kmg as well as a couple others and the Torus is as good as the best of these and better than most at a fraction of the cost. The ratchet tensioning is awesome.

    Rich the owner has given me the best customer service of any company I’ve ever dealt with. The first time I reached out to him he responded back in 10 minutes at 10pm at night. Will always answer any questions I have and even changed the plug out pin the 220v to fit my dryer socket. On a scale of 10 I give torus a 11+. he said he’s working on a surface grinder attachment that I’m excited for.

    I want to reiterate. Anyone is concerned about aluminum, do not be. This thing is more rigid and vibrates less than any grinder i’ve used. The only grinder that seem to be as balanced is the Northridge (RIP). there are some grinders that are great for the price. This grinder is UNBELIEVABLE for the price and competitive with the tw-90/brodbeck/wilmont etc.

    I have no affiliation with Rich and was nervous buying this grinder as it’s not talked about much but it should be. I was ready to pull the trigger on an Ameribrade or brodbeck. I am glad I saved some money and know now I have a better machine.

    aaron emmerichGoogle review by aaron emmerich (opens in a new tab)
  • 5 out of 5 stars

    They are smooth, stable, and punch way above their weight class. The ratcheting tensioning system rules and I will never go back to a spring tensioning system...

    Read the whole review by Will HutchinsonShow the short version of Will Hutchinson’s review

    I am a full time knifemaker and have worked for another knifemaker full time for years before i went on my own. I have used quite a few different grinders on the market and I believe these to be of the highest value on the market. They are smooth, stable, and punch way above their weight class. The ratcheting tensioning system rules and I will never go back to a spring tensioning system...

    Rich Provides the absolute best customer service. If you email or call him, he is the guy you will talk to. He will take care of you and make sure you have the products you want and need for your craft. He genuinely cares about the work he is producing and wants it to be of the highest quality...

    If you are an aspiring knifemaker or a seasoned pro looking to upgrade, build a relationship with Rich and his products. you wont be disappointed and it will pay dividends throughout your journey....

    Will HutchinsonGoogle review by Will Hutchinson (opens in a new tab)

Why this one

Change the lower platen wheel

Order the 4-inch rubber wheel

  • Nominal 4-inch rubber wheel

  • Sold individually as the deep flat platen lower-wheel option

  • Platen attachment and tooling arm sold separately

The platen it fits

This wheel goes on the deep flat platen, which rides its own 1.5-inch arm and swaps in and out of the receiver without tools.

One arm per attachment. Swap in seconds.

  1. Deep flat platenFour inches of throat for deep slack-belt work.12-inch solid 1.5-inch aluminum tooling arm
  2. Adjustable work tableSet the angle once. Grind all day.1.5-inch aluminum tooling arm
  3. Small wheel attachmentReach the curves a platen never will.20-inch small wheel tooling arm, solid 1.5-inch aluminum
  4. Contact wheelPick the wheel that fits your curve.16.5-inch solid 1.5-inch aluminum tooling arm
  • Fits every Torus grinder and most 2×72s built around a 1.5-inch arm
  • two knobs lock each arm

The arm-mounted attachments each ride their own 1.5-inch solid aluminum arm, so they drop straight into any Torus grinder and swap in seconds.

Eligible attachments and wheels save 5% at 2 units, 10% at 3 units, 15% at 4 units, 20% at 5+ units. A grinder counts as one unit; only eligible parts are discounted.

Values marked on the figure: 5% at 2 units; 10% at 3 units; 15% at 4 units; 20% at 5+ units; 1/2 to 1.5-inch rubber small wheels.

The attachment shown for reference. This listing is one 4-inch rubber wheel.

Who it's for

Built for the work you actually do

For makers adding the larger lower rubber wheel to a Torus deep flat platen. Check your attachment with me before ordering if you are unsure of the fit.

What’s in the box

  • One 4-inch rubber wheel

Where the lower wheel runs

The deep flat platen carries two wheels inside the belt loop, and this one replaces the lower of the two.

How the belt runs on a Torus 2x72

  • a 2-inch by 72-inch belt
  • 4-inch machined aluminum drive wheel with 5/8-inch keyed bore
  • machined billet-aluminum dual-axis tracking head
  • 304 stainless ratchet tensioner
  • Deep flat platen attachment on a 1.5-inch tooling arm
  • 90-degree tilt on a pin

A 72-inch belt runs cooler and lasts longer than a short one, a 2-inch face covers a full bevel, and a flat platen gives you a reference surface you can trust.

Every Torus uses the same machined billet-aluminum dual-axis tracking head. All three tilt, take standard 1.5-inch tooling arms and use a 304 stainless ratchet tensioner.

Values marked on the figure: vertical; horizontal; 72 in.

The loop with the standard 2-inch platen wheels; this listing swaps the lower one for a 4-inch.

Specs

Product specifications and dimensions

Base price
$80
Availability
Available to order
Lead time
Most orders ship in 7–10 business days from time of order
Ships from
1741 Industrial Drive Unit #8, Sterling, Illinois
Shop
Torus CNC — Sterling, Illinois, USA

Options

Choose and compare product options

Compare motor packages, attachments and finish choices before ordering.

Add it to your cart

  • Lower wheel choice

    Choose this 4-inch wheel or the separate 2-inch wheel for the bottom of the deep flat platen. You do not need both for the same position. Eligible attachments and wheels save 5% at 2 units, 10% at 3 units, 15% at 4 units, 20% at 5+ units. A grinder counts as one unit; only eligible parts are discounted.

  • Reference photos

    The photos show the deep flat platen, a Nova platen setup and the smaller 2-inch rubber wheel for context. They do not show the supplied 4-inch wheel.

Before you order

Shipping, warranty and returns

Read the full policy

  • Shipping and lead time

    I ship these parts from my shop in Sterling, Illinois. See the shipping estimate above; local pickup is available. Email me for an international shipping quote. Ground shipping in the lower 48: $95 a grinder, $145 with a motor package, $75 a motor on its own, and $35 for the first accessory plus $15 each after. A grinder with a motor and any accessories is capped at $145.

  • Warranty

    I warranty the non-wear parts against defects in materials and workmanship under normal use. Motors and VFDs carry their manufacturer's warranty; contact me for guidance on the manufacturer's claim process.

  • Returns

    Returns are reviewed case by case and must be pre-approved within two weeks of arrival. The buyer covers insured return shipping, a 25% restocking fee applies, and original shipping is not refunded.

Straight answers

Questions I get about the 4-inch rubber wheel

Is the platen attachment included?
No. This listing is one 4-inch rubber wheel. The attachment and grinder in the reference photos are sold separately.
Where does this wheel go?
It is offered as the lower-wheel option on my deep flat platen attachment. Use the 2-inch wheel for the top.
Should I buy both bottom-wheel sizes?
No. Pick either the 2-inch or the 4-inch rubber wheel for the bottom position, depending on the setup you want.
Will it fit another platen?
Email me your platen and axle dimensions before ordering. I will check the fit with you.
Does it count toward bundle savings?
Eligible attachments and wheels save 5% at 2 units, 10% at 3 units, 15% at 4 units, 20% at 5+ units. A grinder counts as one unit; only eligible parts are discounted.

Goes with it

The grinders this was built for

Standard 1.5-inch tooling arms fit all four Torus grinders.

See the whole shop
  • Classic aluminum 2x72 grinder, side view with flat-platen tool arm and yellow Safety Rules label, on black with a purple glow

    Torus 2×72 Classic Aluminum Belt Grinder

    The original Torus design, still $995.

    Starts at$995View

ForgeBrain

Read this before you build

Free knifemaking guides from the same bench, organized by the work at the grinder.

Browse all 227 guides
2x72 abrasive belts in graduated grits on the shop wall
Abrasives

The Complete 2×72 Attachments Guide

A 2×72 out of the box is a platform; the attachments are the machine. Every serious grinder task — flat bevels, hollow grinds, fullers, handle curves, repeatable angles — belongs to a specific attachment, and knowing which is which turns one machine into six. Here is the complete map, with the buying order that makes…

Read the guide
2x72 abrasive belts in graduated grits on the shop wall
Abrasives

Belt Buyer’s Guide: Which Abrasives to Actually Buy

Belts are the single biggest recurring cost in this hobby, and buying the wrong ones wastes money twice: once on belts that wear out fast, and again on the extra time spent fighting a dull or mismatched belt instead of actually grinding. Here’s what to actually buy. The Three Abrasive Types Aluminum oxide is the…

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One-man shop

Tell me what you're building

I answer my own email and build Torus grinders in this shop. If you are not sure which setup fits your work, ask me before you order.

Order the 4-inch rubber wheelAsk Rich a question