Description
The Specialinsert Keep-Nut EVO CNC drill bit is an 11.5 mm bit for drilling Keep-Nut anchor holes in granite, marble, quartzite, engineered quartz, porcelain, and sintered stone on automated CNC routers. A shop that cuts natural stone, quartz, and porcelain on one router can drill the Keep-Nut holes with a single bit. The setup comes down to speed, a hole depth that matches the Keep-Nut height, and a Go/No-Go check.
Key Product Details
| Property | Value |
|---|---|
| Part Number | SPE-FKN12X10EVO |
| Manufacturer Part Number | FKN12X10EVO |
| Brand | Specialinsert |
| Bit Type | CNC drill bit |
| Diameter | 0.453 in (11.5 mm) |
| Length | 3.150 in (80 mm) |
| External Thread | 1/2 GAS male (G 1/2) |
| Internal Thread | M14 |
| Materials | Granite, marble, quartzite, engineered quartz, porcelain, sintered stone |
| Used With | Automated CNC routers |
| Maximum Speed | 6,500 RPM |
| Hole Depth | Matches Keep-Nut height, see the depth table below |
| Packaging | Each |
Performance in Production
- Keep the spindle at or below 6,500 RPM, the maximum Specialinsert lists for this bit.
- One bit covers six materials. A shop that runs granite, quartz, and porcelain on the same router does not need to change bits between slabs.
- If your router already runs our Chem-Set 11.8 mm CNC Keep-Nut bits, the 1/2 GAS male thread is the same.
- Program the hole depth to match the Keep-Nut height so the insert sits flush. Depth changes with the Keep-Nut size, so check the table below.
- Check the first hole with the Go/No-Go gauge before you run a full slab.
- Specialinsert does not publish a feed rate or cooling recommendation for this bit. Call us for a starting point on your slab.
Common Applications
- Undermount sink anchor holes in granite, marble, and quartzite on a CNC router
- Sink anchor holes in engineered quartz
- Keep-Nut holes in porcelain and sintered stone slabs
- Production Keep-Nut hole drilling where position and depth need to repeat from slab to slab
- Panel and cladding anchor holes in stone and porcelain
- Shops that run natural stone, quartz, and porcelain on one router and want one Keep-Nut bit
Available Sizes
- 11.5 mm CNC bit, 1/2 GAS male thread, each: SPE-FKN12X10EVO
Related Products
- Keep-Nut Go/No-Go Gauge for checking hole diameter and depth
- Keep-Nut Setting Tool for seating the anchor
- Keep-Nut CNC Drill Bit, 11.8mm (CCH-KNBITCNC-11.8-D) for porcelain and sintered stone
- Keep-Nut CNC Drill Bit, 11.8mm (CCH-KNBITCNC-11.8MM) for natural stone and quartz
- Specialinsert EVO Manual Drill Bit, 11.5mm for the KDM115
How CNC Keep-Nut Hole Drilling Works
A CNC router drills every Keep-Nut hole to the same position and depth. These are the shop steps.
- Mount the bit in the router’s 1/2 GAS tooling.
- Program the hole positions and set the depth to match the height of your Keep-Nut. Use the table below.
- Set the spindle at or below 6,500 RPM. Call us for feed rate and cooling starting points for your slab.
- Drill, clear the debris, and check the first hole with the Go/No-Go gauge. The Go side should fit snugly and the No-Go side should not enter. If the No-Go side fits, the hole is too wide.
- Thread the Keep-Nut onto the setting tool and tap it in with a rubber mallet until it is fully seated and flush.
| Keep-Nut Size | Hole Depth |
|---|---|
| IM1S (H5) | 0.217 in (5.5 mm) |
| IM2S (H6) | 0.256 in (6.5 mm) |
| IM4S (H8.5) | 0.335 in (8.5 mm) |
| IM4S (H15) | 0.610 in (15.5 mm) |
Frequently Asked Questions
What CNC drill bit do I use for Keep-Nut anchors in granite, quartz, and porcelain?
Use this Specialinsert EVO bit. It is listed for granite, marble, quartzite, engineered quartz, porcelain, and sintered stone, so one bit covers all six.
What RPM can I run the EVO CNC bit at?
Specialinsert lists 6,500 RPM as the maximum. They do not publish a feed rate or cooling recommendation for this bit, so call us at (800) 220-1966 for a starting point on your slab.
What thread does the EVO CNC bit have?
It has a 1/2 GAS male external thread and an M14 internal thread. The part number is FKN12X10EVO at Specialinsert and SPE-FKN12X10EVO here.
How is the EVO CNC bit different from the Chem-Set 11.8 mm CNC bits?
The EVO bit is 11.5 mm and is listed for all six materials, while the Chem-Set bits are 11.8 mm and split by material. The blue bit is for natural stone and quartz, and the white bit is for porcelain and sintered stone.
How deep do I program the hole for a Keep-Nut?
Match the depth to the Keep-Nut size so the insert sits flush. The hole depth table above lists each size.
Can I use the EVO CNC bit on solid surface or plastics?
The listed materials are the six stone and porcelain types above. For solid surface, compact laminate, phenolic, acrylic, and plastics, our Drill Bit Guide lists a separate CNC bit, CCH-KNBITSSCNC-12MM. Call us if you are not sure which bit fits your material.
Is there a manual version of the EVO bit?
Yes. The EVO manual bit is also 11.5 mm and has a 5/8-11 UNC internal thread for the KDM115 drilling machine.
Questions on fit for your CNC Keep-Nut setup? Call (800) 220-1966 or email [email protected].
Keep-Nut is a registered trademark of Specialinsert.
Reviews
There are no reviews yet.