IGM M114 is a round nose router bit with 2 carbide cutting edges (HW), designed for routing U-shaped grooves in wood, MDF, laminate, plastic and artificial stone. It is available in three radii (4.75 mm, 6.35 mm, 9.5 mm) with an 8 mm shank. Compatible with handheld routers and CNC machines. Distributed in Italy by Krollit, official IGM distributor since 2007.
- Profile: round U-groove
- Available radii: 4.75 mm, 6.35 mm, 9.5 mm
- Cutting diameter: 9.5 mm, 12.7 mm, 19 mm depending on the version
- Cutting height: 6.4 mm, 9.5 mm, 12.7 mm depending on the version
- Shank: 8 mm on all versions
- Bearing: not included — possibility to mount a bearing on the shank with a stop collar
- Alternative guide: template guide bushing on handheld router
- Cutting edge material: micro-grain HW carbide, hardness 93.5 HRA, thickness 2 mm
- Red PTFE Teflon coating: protection against corrosion, resin and burn marks
- Anti-kickback technology compliant with EN 847
- Laser-marked shank with parameters and “K” point for optimal positioning in the collet
- Use: handheld routers and CNC machines
Who uses the M114 and what it is used for
The IGM M114 router bit is used by carpenters, woodworking craftsmen and custom kitchen manufacturers to route finger pull grooves on cabinet doors and drawers, decorative grooves on panels and drainage grooves on cutting boards and worktops made of wood or artificial stone. The 4.75 mm radius is chosen for narrow grooves on thin profiles and MDF doors. The 6.35 mm radius is the most requested for standard finger pull grooves on kitchen doors. The 9.5 mm radius produces wider grooves on worktops and thick panels, including artificial stone. CNC compatibility makes it suitable for both manual production and automated small-batch cycles.
Who the M114 is suitable for
| Profile |
Compatibility |
Reason |
| Custom kitchen and furniture manufacturer |
Suitable |
The three radii cover standard finger pull groove sizes on doors and drawers |
| Craftsman working on artificial stone worktops and cutting boards |
Suitable |
Compatible with plastic and artificial stone, PTFE coating reduces resin build-up |
| User looking for a router bit with bearing already fitted |
Not suitable |
The M114 does not include a bearing — for template trimming use the M107 series or mount a bearing on the shank with a separate stop collar |
Not suitable for: square or V-shaped grooves — the M114 exclusively produces a U-profile with rounded bottom; for straight profiles use straight router bits, for V-profiles use dedicated V-groove bits.
IGM technology and build quality
The micro-grain carbide cutting edges are brazed and sharpened on 5-axis CNC centers with automatic balancing. Hardness is 93.5 HRA, thickness 2 mm with a minimum of 1 mm for reduced-diameter versions. The increased thickness allows multiple resharpening cycles without loss of cutting quality. The red PTFE Teflon coating reduces friction and protects against resins and adhesives. Each router bit passes an automated quality control that detects deviations from the required parameters. The anti-kickback technology complies with the European EN 847 standard.
Technical specifications — all variants
| Version |
Radius R (mm) |
Diameter D (mm) |
Length L (mm) |
Cutting height I (mm) |
Shank S (mm) |
| M114 R4.75 D9.5x6.4 L48 | 4.75 | 9.5 | 48 | 6.4 | 8 |
| M114 R6.35 D12.7x9.5 L50 | 6.35 | 12.7 | 50 | 9.5 | 8 |
| M114 R9.5 D19x12.7 L53 | 9.5 | 19 | 53 | 12.7 | 8 |
Common specifications for all versions
| Number of cutting edges (Z) | 2 |
| Geometry | Straight cutting edge |
| Profile | Round U-groove |
| Rotation | Clockwise, right-hand rotation |
| Cutting edge material | Micro-grain HW carbide |
| Cutting edge hardness | 93.5 HRA |
| Cutting edge thickness | 2 mm |
| Coating | Red PTFE Teflon |
| Anti-kickback | Yes, compliant with EN 847 |
| Bearing | Not included |
| Shank marking | Laser: code, D, I, S, max RPM, K point |
| Packaging | Resealable case with specification label |
| Workable materials | Softwood and hardwood, plywood, DTD, MDF, laminate, plastic, artificial stone |
| Use | Handheld routers and CNC machines |
Frequently Asked Questions
What is the difference between the three available radii of the M114?
The radius determines the width and depth of the U-shaped groove. R4.75 mm produces a 9.5 mm wide and 6.4 mm deep groove, suitable for thin profiles and MDF doors. R6.35 mm is the standard size for finger pull grooves on kitchen doors, with 12.7 mm width and 9.5 mm depth. R9.5 mm produces the widest groove, 19 mm wide and 12.7 mm deep, for worktops and thick panels.
Is the M114 compatible with CNC machines as well as handheld routers?
Yes, unlike the M107 series, the M114 is compatible with both handheld routers and CNC machines. The 8 mm shank is standard on both types of machine. The laser marking with maximum RPM on the shank provides the reference for CNC programming.
How is it used without a bearing to follow a template?
Without an integrated bearing, there are two possible methods: mount an additional bearing on the shank using a stop collar, not included, or use a fixed template guide bushing on the handheld router. The guide bushing is the most common method for template routing with bits without bearings.
Can the router bit be resharpened?
Yes. The HW cutting edges have a thickness of 2 mm, sufficient for multiple resharpening cycles. For reduced-diameter versions, the minimum thickness is 1 mm. Resharpening is recommended at a specialized center to maintain the U-profile and original balance. The laser-marked parameters on the shank serve as a reference for the sharpening service.
Which materials can be machined with the M114?
The M114 is compatible with softwood and hardwood, glued wood, plywood, DTD, MDF, laminate, plastic and artificial stone. The PTFE Teflon coating reduces resin build-up when machining synthetic materials and adhesives.
What are the recommended maximum RPM values?
The recommended maximum RPM values are specific to each version and are laser-marked on the shank of each individual router bit. Always check the marking before use and do not exceed the indicated value.
