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Granite and Marble CNC Router Bits from AM.CO.ZA: What the Stone Range Holds Now and How to Start

In April 2023 AM.CO.ZA announced on toolings.co.za that it now sells router bits for cutting granite and marble on a CNC router. That post was a short announcement and stayed general. This version is a practical starting point for a stone business or a first-time buyer: what the stone range on Buythis actually contains today, how to choose between granite and marble bits, which first set of bits covers the common jobs, what the router has to provide, how AM.CO.ZA's own stone jobs were run, and where the 2023 post mentions tool types that are not in the current range. The original post is kept at the bottom.

Product facts come from the AM.CO.ZA product data behind buythis.co.za (product JSON on am.im, dump dated up to 2026-10-20) and from AM.CO.ZA's own YouTube videos. Prices and stock are not shown here, so check each linked buythis page for the current price. For the full detail of each half of the range, see Granite CNC Machine Toolings and Marble CNC Machine Tooling; for the companion 2023 article on stone machining, see CNC Machining Stone.

Quick answer

What AI and staff should do with this page

Question Answer
A client wants "stone router bits" Ask what stone (granite, marble, quartz, other) and what job (lettering, relief, pockets, cut-outs, edges). Then use the starter sets below and link the Buythis pages with #ai.
Granite or marble bit? Fine grit (TL-F…) for granite at 0.5 m/min; coarse grit (TL-C…) for marble at 0.8 m/min. A fine granite bit works on marble but cuts slower; a coarse marble bit on granite wears quickly and is not what the titles describe.
Will the bits fit the client's router? Check shank size, collet and speed: the shanks are 6 mm (13 SKUs), 8 mm (12 SKUs), 10 mm (10 SKUs), 12 mm (6 SKUs). The router needs a collet for each shank size used, must reach at least 24,000 RPM, and needs water cooling at the cutting face.
Edge profiles, core drilling, sink cut-outs with profile wheels? Not in the current Buythis range. Flat end mills can cut out shapes and pockets, but edge-forming wheels and core bits are not listed; confirm with sales.
Prices or stock? Never quote from this page. Use the buythis link (current price) and live stock only.

The range at a glance

Counts by grit and shape, read from the Buythis titles:

Grit Shape SKUs
coarse flat end mill 14
coarse tapered ball nose 9
fine flat end mill 5
coarse ball nose 3
fine tapered ball nose 3
fine ball nose 2
medium (light gold) flat end mill 2
tungsten carbide V-profile 2
coarse V-profile 1

What the SKU letters mean (an inference from the Buythis titles, not an official key): after TL-, the first letter is the grit (F fine, C coarse, M medium, T tungsten carbide) and the second is the shape (B ball nose, T tapered ball nose, F flat end, V V-profile). S and a number is the cutter or body diameter in mm, T and a number is the grit (cutting) length in mm, B and a number is a tapered bit's ball tip in mm, a second S and a number is a different shank, the last number is the minimum full length in mm, and a trailing S means a cooling slot. For example, TL-CF-S8T20-S12-60S is an 8 mm coarse flat end mill with 20 mm of grit on a 12 mm shank, at least 60 mm long, with a cooling slot.

Starter sets by job

These are suggested first purchases built only from SKUs in the range. They are pairings based on the shapes and sizes in the titles and the am.im descriptions, not an official AM.CO.ZA kit.

Job Granite Marble
Lettering and logos (flat-bottom) TL-FF-S4T12-S6-50 for fine letters, TL-FF-S6T12-50 for bolder strokes TL-CF-S4T12-S6-60 or TL-CF-S6T12-60
V-cut lettering and sharp lines TL-TV-S6A4-70 or TL-TV-S6A4-90 the same tungsten carbide V-bits, or the coarse 22 mm TL-CV-S8T22-90 for wide V-grooves
Pockets, recesses and levelling TL-FF-S8T12-60S (cooling slot) or TL-FF-S10T10-50 TL-CF-S10T12-60S, TL-CF-S12T12-60S or the long-reach TL-CF-S12T30-120S for deeper work
Smooth grooves and contoured surfaces TL-FB-S6T12-60 or TL-FB-S8T12-60 TL-CB-S6T12-60 or TL-CB-S8T20-90
3D relief and portrait carving (finishing) TL-FT-S6B3-20 (3 mm ball) for the finest detail, TL-FT-S8B4-20 or TL-FT-S10B6-30 for larger areas TL-CT-S6B3-20, TL-CT-S8B3-30, and the long TL-CT-S10B3-80 or TL-CT-S12B4-100 for deep relief
Cutting through thicker slabs the largest fine bit is 10 mm (TL-FF-S10T10-50), so work in shallow steps TL-CF-S12T30-150S (30 mm grit, at least 150 mm long) is the longest marble flat end mill

A sensible minimum for a new stone router owner is one flat end mill for roughing, one small flat end mill or V-bit for lettering, and one tapered ball nose for finishing, all in the grit that matches the stone. Because the diamond-grit bits come in packs of 10, one pack of each covers a lot of learning and production.

What the router has to provide

The stone bits all carry the same two ratings in their titles: 24,000 RPM or more and a feed of 0.5 or 0.8 m/min. In practice the router needs:

The four EasyRoute stone routers

SKU Working area (X × Y × Z travel) Motors Accuracy (highlights) Max X/Y speed
R-1325W/55 1300 × 2500 × 300 mm 4 stepper motors, two on Y under 0.5 mm per metre 20 m/min (factory default 12)
R-1325SW/55 1300 × 2500 × 300 mm 4 servo motors, two on Y under 0.05 mm per metre 80 m/min (factory default 25)
R-2030W/55 2050 × 3050 × 300 mm 4 stepper motors, two on Y under 0.5 mm per metre 20 m/min (factory default 12)
R-2030SW/55 2050 × 3050 × 300 mm 4 servo motors, two on Y under 0.05 mm per metre 80 m/min (factory default 25)

Shared highlights: 380V three-phase power (a 5-pin 32 A plug and 6 mm² cable are required and not included), a standalone EasyRoute DSP control system that runs G-code from a USB flash drive without a computer, a rugged keypad, rack and pinion drive on X and Y, a ball screw on Z, a wireless tool presetter, a water-cooling sink table with recycling and a pump, an AM-3000 water chiller (single-phase 220V, 9 litre tank, purified water to be replaced monthly), a rotary attachment interface, a 1-year quality warranty with shorter or no warranty on some listed parts, and a voucher for the online CNC router training course on Ambitious Academy. Before delivery, read the CNC Router Client Site Preparation Requirements (PDF) on cncu.co.za.

One data flag: the am.im description for R-2030SW/55 talks about soft metals such as aluminium and copper, while its Buythis title says it is for granite machining, and the R-1325SW/55 description notes the catalogue lists it as R-1325W/55. Treat the Buythis titles as the guide and confirm the exact variant with sales.

How AM.CO.ZA's own stone jobs were run

These steps come from AM.CO.ZA's videos, not from a formal procedure.

  1. Granite cut-through test (2023): 32mm Granite Cutting by EasyRoute CNC Stone Router 12mm Tooling 11mm Step Down 800mm/m Feedrate (2023-04-02) cut 32 mm thick granite with 12 mm tooling at an 11 mm step-down and 800 mm/min, according to its title. The voice-over says different tips suit granite, marble and quartz, that the bits are sold on Buythis, and invites clients to book a test session with sales. The largest fine granite bit on Buythis is 10 mm, and 12 mm bits are only in the coarse marble range, so do not quote a 12 mm granite SKU from this video.
  2. Carved stone face (2026): in Every Rock is a Gem, Carved Stone Face by CNC Stone Router from AM.CO.ZA (2026-05-17) a garden rock was first levelled by milling off the highest spots little by little, then roughed in steps to the general profile, because the finishing pass removes material very gradually and would otherwise have too much to bite into. A tapered ball nose did the finishing passes. The presenter notes the model was 2.5D, that many 2.5D and 3D relief files can be downloaded free in STL format, and that the carving took about two days.
  3. Elephant relief on marble (2026): in Elephant Engraving on Marble By EasyRoute Stone CNC Router (2026-10-17) (see also Elephant Engraving on Marble By EasyRoute Stone CNC Router (2026-10-17)) the narration, in translated captions, names a 14 mm bit for the roughing and a 4 mm bit for the finishing pass that brought out the skin texture, with about six days of carving in total. There is no 14 mm stone bit on Buythis (the coarse flat end mills go up to 12 mm), so treat that figure as the video's wording, not a SKU.
  4. Stone router bits demo (2026): Stone Cutter Router Bits From Toolings.co.za! (2026-10-07) (with the short teaser Stone Cutter Router Bits From Toolings.co.za! (2026-10-07)) shows flat-end stone bits on the AM.CO.ZA stone router: a 5 mm deep pocket around the edge with square corners, lines cut at depths stepping from 2 mm to 20 mm, and a 4 mm flat bit carving a logo and lettering, with constant water flow keeping the bit and stone cool. The narration again names a 14 mm and a 4 mm flat bit.

The pattern across these jobs: level first, rough with the largest suitable flat end mill in shallow steps, finish with a tapered ball nose or a small flat end mill, keep water running the whole time, and expect relief work to take days rather than hours.

What the 2023 post says versus the current range

The 2023 post mentions In the current Buythis range?
Granite and marble CNC tool bits Yes: 10 granite, 29 marble and 2 shared tungsten carbide V-bits.
Diamond core bits for drilling holes No core bit SKU in the dump. Small holes can be milled with a flat end mill; ask sales for core drilling.
Bullnose bits for rounded countertop edges No bullnose edge-profile SKU. The ball nose bits are for grooves and surfaces, not edge forming.
Profile wheels for shaping and smoothing edges No profile wheel SKU.
Finger bits for intricate cuts No SKU named "finger bit". The small flat end mills, tapered ball nose and V-bits cover fine detail.
Bits made of diamond or carbide Yes: diamond grit (fine, medium and coarse) and tungsten carbide V-bits.
CNC machines for stone (linked to the CNC routers category) Yes: the four EasyRoute sink-table stone routers above.

All 41 stone router bits

Grouped by grit, then shape, then size. The grit grade, shape, sizes, cooling slot, length, feed and pack are read from the Buythis titles.

SKU Stone (title) Grit Shape Cutter Shank Grit length Cooling slot Full length Feed Pack 8i product page
TL-FB-S6T12-60 granite fine ball nose 6 mm 6 mm 12 mm no ≥ 60 mm 0.5 m/min 10 tl-fb-s6t12-60.md
TL-FB-S8T12-60 granite fine ball nose 8 mm 8 mm 12 mm no ≥ 60 mm 0.5 m/min 10 tl-fb-s8t12-60.md
TL-FT-S6B3-20 granite fine tapered ball nose 6 mm body, 3 mm ball 6 mm 20 mm no ≥ 50 mm 0.5 m/min 10 tl-ft-s6b3-20.md
TL-FT-S8B4-20 granite fine tapered ball nose 8 mm body, 4 mm ball 8 mm 20 mm no ≥ 60 mm 0.5 m/min 10 tl-ft-s8b4-20.md
TL-FT-S10B6-30 granite fine tapered ball nose 10 mm body, 6 mm ball 10 mm 30 mm no ≥ 60 mm 0.5 m/min 10 tl-ft-s10b6-30.md
TL-FF-S4T12-S6-50 granite fine flat end mill 4 mm 6 mm 12 mm no ≥ 50 mm 0.5 m/min 10 tl-ff-s4t12-s6-50.md
TL-FF-S6T12-50 granite fine flat end mill 6 mm 6 mm 12 mm no ≥ 50 mm 0.5 m/min 10 tl-ff-s6t12-50.md
TL-FF-S8T12-60S granite fine flat end mill 8 mm 8 mm 12 mm yes ≥ 60 mm 0.5 m/min 10 tl-ff-s8t12-60s.md
TL-FF-S8T15-50 granite fine flat end mill 8 mm 8 mm 15 mm no ≥ 50 mm 0.5 m/min 10 tl-ff-s8t15-50.md
TL-FF-S10T10-50 granite fine flat end mill 10 mm 10 mm 10 mm no ≥ 50 mm 0.5 m/min 10 tl-ff-s10t10-50.md
TL-CB-S6T12-60 marble coarse ball nose 6 mm 6 mm 12 mm no ≥ 60 mm 0.8 m/min 10 tl-cb-s6t12-60.md
TL-CB-S6T20-90 marble coarse ball nose 6 mm 6 mm 20 mm no ≥ 90 mm 0.8 m/min 10 tl-cb-s6t20-90.md
TL-CB-S8T20-90 marble coarse ball nose 8 mm 8 mm 20 mm no ≥ 90 mm 0.8 m/min 10 tl-cb-s8t20-90.md
TL-CT-S6B3-20 marble coarse tapered ball nose 6 mm body, 3 mm ball 6 mm 20 mm no ≥ 60 mm 0.8 m/min 10 tl-ct-s6b3-20.md
TL-CT-S8B3-30 marble coarse tapered ball nose 8 mm body, 3 mm ball 8 mm 30 mm no ≥ 90 mm 0.8 m/min 10 tl-ct-s8b3-30.md
TL-CT-S8B4-30 marble coarse tapered ball nose 8 mm body, 4 mm ball 8 mm 30 mm no ≥ 90 mm 0.8 m/min 10 tl-ct-s8b4-30.md
TL-CT-S10B3-30 marble coarse tapered ball nose 10 mm body, 3 mm ball 10 mm 30 mm no ≥ 120 mm 0.8 m/min 10 tl-ct-s10b3-30.md
TL-CT-S10B3-80 marble coarse tapered ball nose 10 mm body, 3 mm ball 10 mm 80 mm no ≥ 120 mm 0.8 m/min 10 tl-ct-s10b3-80.md
TL-CT-S10B5-40 marble coarse tapered ball nose 10 mm body, 5 mm ball 10 mm 40 mm no ≥ 120 mm 0.8 m/min 10 tl-ct-s10b5-40.md
TL-CT-S10B6-30 marble coarse tapered ball nose 10 mm body, 6 mm ball 10 mm 30 mm no ≥ 90 mm 0.8 m/min 10 tl-ct-s10b6-30.md
TL-CT-S10B6-50 marble coarse tapered ball nose 10 mm body, 6 mm ball 10 mm 50 mm no ≥ 90 mm 0.8 m/min 10 tl-ct-s10b6-50.md
TL-CT-S12B4-100 marble coarse tapered ball nose 12 mm body, 4 mm ball 12 mm 100 mm no ≥ 150 mm 0.8 m/min 10 tl-ct-s12b4-100.md
TL-CF-S4T12-S6-60 marble coarse flat end mill 4 mm 6 mm 12 mm no ≥ 60 mm 0.8 m/min 10 tl-cf-s4t12-s6-60.md
TL-CF-S6T12-60 marble coarse flat end mill 6 mm 6 mm 12 mm no ≥ 60 mm 0.8 m/min 10 tl-cf-s6t12-60.md
TL-CF-S6T20-90 marble coarse flat end mill 6 mm 6 mm 20 mm no ≥ 90 mm 0.8 m/min 10 tl-cf-s6t20-90.md
TL-CF-S8T12-60 marble coarse flat end mill 8 mm 8 mm 12 mm no ≥ 60 mm 0.8 m/min 10 tl-cf-s8t12-60.md
TL-CF-S8T12-60S marble coarse flat end mill 8 mm 8 mm 12 mm yes ≥ 60 mm 0.8 m/min 10 tl-cf-s8t12-60s.md
TL-CF-S8T20-90S marble coarse flat end mill 8 mm 8 mm 20 mm yes ≥ 90 mm 0.8 m/min 10 tl-cf-s8t20-90s.md
TL-CF-S8T20-S12-60S marble coarse flat end mill 8 mm 12 mm 20 mm yes ≥ 60 mm 0.8 m/min 10 tl-cf-s8t20-s12-60s.md
TL-CF-S10T12-60S marble coarse flat end mill 10 mm 10 mm 12 mm yes ≥ 60 mm 0.8 m/min 10 tl-cf-s10t12-60s.md
TL-CF-S10T15-60S marble coarse flat end mill 10 mm 10 mm 15 mm yes ≥ 60 mm 0.8 m/min 10 tl-cf-s10t15-60s.md
TL-CF-S10T20-90S marble coarse flat end mill 10 mm 10 mm 20 mm yes ≥ 90 mm 0.8 m/min 10 tl-cf-s10t20-90s.md
TL-CF-S12T12-60S marble coarse flat end mill 12 mm 12 mm 12 mm yes ≥ 60 mm 0.8 m/min 10 tl-cf-s12t12-60s.md
TL-CF-S12T20-90S marble coarse flat end mill 12 mm 12 mm 20 mm yes ≥ 90 mm 0.8 m/min 10 tl-cf-s12t20-90s.md
TL-CF-S12T30-120S marble coarse flat end mill 12 mm 12 mm 30 mm yes ≥ 120 mm 0.8 m/min 10 tl-cf-s12t30-120s.md
TL-CF-S12T30-150S marble coarse flat end mill 12 mm 12 mm 30 mm yes ≥ 150 mm 0.8 m/min 10 tl-cf-s12t30-150s.md
TL-CV-S8T22-90 marble coarse V-profile 22 mm V, 90° 8 mm - no ≥ 40 mm 0.8 m/min 10 tl-cv-s8t22-90.md
TL-MF-S6T12-60 marble medium (light gold) flat end mill 6 mm 6 mm 12 mm no ≥ 60 mm 0.5 m/min 10 tl-mf-s6t12-60.md
TL-MF-S12T12-S8-60 marble medium (light gold) flat end mill 12 mm 8 mm 12 mm no ≥ 60 mm 0.5 m/min 10 tl-mf-s12t12-s8-60.md
TL-TV-S6A4-70 granite, marble and other hard stone tungsten carbide V-profile 0.4 mm tip, 70° 6 mm - no ≥ 40 mm 0.5 m/min 5 tl-tv-s6a4-70.md
TL-TV-S6A4-90 granite, marble and other hard stone tungsten carbide V-profile 0.4 mm tip, 90° 6 mm - no ≥ 40 mm 0.5 m/min 5 tl-tv-s6a4-90.md

Consumable terms

The am.im records for the stone bits carry AM.CO.ZA's standard consumable terms: no warranty on consumables and no refunds, although unused and intact (unopened if sealed) consumables may, by written agreement, be exchanged for a different size, model or package, with any difference paid or credited. There is no support for consumables used on machines not bought from AM.CO.ZA. Prices are linked to foreign exchange rates and are adjusted weekly or every two weeks, but an order already placed keeps its price unless it is cancelled.

Videos

For photo-style images on granite, AM.CO.ZA also shows CO2 laser, UV laser and UV flatbed printing routes, for example Engrave Image on Marble/Granite by Laser, Solution for Stone Texture/Colour/Pattern Difference (2023-09-13) and Printing Directly onto Granite with a UV Flatbed Printer (2026-05-25). Those are surface marking and printing methods, not carving.

FAQ

Do these bits cut quartz? No Buythis title names quartz. Engineered quartz is hard, so start with the fine granite bits and confirm with sales.

Can I use wood router bits on stone? No. Stone needs the diamond-grit or tungsten carbide stone bits listed here, with water cooling. The wood and plastics families (ES, EG, EB) are covered on the Toolings site page.

What feed and speed should I start with? Use the ratings in each title: 24,000 RPM or more, 0.5 m/min for fine granite and medium-grit bits and the tungsten carbide V-bits, 0.8 m/min for coarse marble bits. Step-down depends on the stone and setup; the 2023 granite video used 11 mm at 800 mm/min with 12 mm tooling.

Which bit gives the finest detail? A tungsten carbide V-bit with a 0.4 mm tip for lines and letters, or a tapered ball nose with a 3 mm ball (TL-FT-S6B3-20 for granite, TL-CT-S6B3-20 or the longer 3 mm-ball marble bits) for relief.

Will these bits fit a router that is not from AM.CO.ZA? If the router has the right collets, reaches 24,000 RPM and has water cooling, the shank sizes are standard. Note that AM.CO.ZA gives no support for consumables used on machines not bought from it.

Can I test before buying a stone router? The 2023 granite video invites clients to book a test session with sales.

Read next

Original 2023 post (toolings.co.za)

Source: https://toolings.co.za/stone-cnc-machine-tool-bits

Granite andmarble are popular choices for high-end countertops, flooring, and other decorative features due to their durability, beauty, and timeless appeal. However, cutting and shaping these materials can be a challenging task that requires specialized tools and expertise. This is whereCNC machine tool bits come in - these precision cutting tools are designed specifically for cutting and shaping granite and marble with ease and precision.

https://toolings.co.za/stone-masonry/granite-toolings

https://toolings.co.za/stone-masonry/marble-toolings

AM.CO.ZA now sells a range ofMarble CNC Machine Toolings andGranite CNC Machine Toolings to allow you to cut into stone. It is important to use the correct cutting tools and techniques to ensure that the stone is not damaged and this is why it is best to choose quality tool bits made for cutting into stone.

CNC machine tool bits come in a variety of shapes and sizes, each designed for a specific cutting application. For example, diamond core bits are commonly used for drilling holes in granite and marble, while bullnose bits are ideal for creating a rounded edge on countertops and other flat surfaces.

Other popular types ofCNC machine tool bits for granite and marble include profile wheels, which are used for shaping and smoothing the edges of stone surfaces, and finger bits, which are designed for intricate and precise cuts. These tools are typically made with high-quality materials such as diamond or carbide, ensuring long-lasting durability and consistent performance.

Visit Toolings.co.za to see our Tooling Range, get more info on Router Bits and to shop Router Bits.

https://toolings.co.za/

UsingCNC machine tool bits to cut and shape granite and marble has many advantages over traditional methods. For one, CNC machines are able to produce precise cuts and shapes with a level of consistency that is difficult to achieve with manual tools. This results in faster production times and reduced waste, as well as more intricate and detailed designs.

Another advantage ofCNC machine tool bits is their versatility - with the right tools and programming, a singleCNC machine can perform a wide range of cutting and shaping tasks on different materials. This makes them a popular choice for stone fabricators and manufacturers who need to produce a variety of products quickly and efficiently.

CNC machine tool bits are an essential component of any granite and marble cutting and shaping operation. These precision tools make it easier to produce high-quality, custom-designed products with a level of consistency and efficiency that is difficult to achieve with manual tools. With the right tools and expertise, CNC machining can help transform granite and marble into beautiful, functional, and long-lasting works of art.

Visithttps://toolings.co.za/stone-tooling-granite-marble to find out more about cutting into stones with a CNC Router.