Complete cermet system for bearing ring turning: SNMN/TNMN ring inserts, TNGN/SNGN form insert blanks, F-JY V-blanks and 70+ dedicated toolholders — for raceway, seal groove, chamfer and oil groove forms on deep groove ball, tapered roller, hub, needle and cylindrical roller bearings.
104 Models · 7 Series
Bearing types covered
Koves bearing form tools are built for bearing-ring turning automatic lines. They machine the raceway, seal groove, chamfers and oil grooves of inner and outer rings for:
- Deep groove ball bearings — raceway tools, seal groove tools and R-chamfer tools for inner and outer rings
- Tapered roller bearings — chamfer and form tools for inner and outer rings, including combined forms
- Hub (wheel) bearings — inner and outer ring forms
- Needle roller bearings — inner and outer ring forms
- Cylindrical roller bearings — inner and outer ring forms
- Non-standard rings — custom form tools made to your ring drawing
Why indexable form tools on bearing lines
The insert profiles are corrected by computer-aided calculation to hold ring geometry. When an edge wears out, index to a fresh edge — no regrinding loop, no re-setting of the machine to a different cutting position.
Application data from bearing plants switching to indexable form tools: turning productivity up by roughly 20% (no tool regrinding and less adjustment), grinding productivity up by roughly 10% (less grinding stock and better turned geometry), and fewer grinding scrap losses because the turned raceway geometry no longer causes wheel contact errors.
Ordering note: outer-ring and inner-ring tools exist in clockwise and counter-clockwise spindle versions, with internal or external chip evacuation. When ordering, tell us the full process route (including whether the insert is mounted face-down and whether the holder is clamped on its base) so we can pre-check the edge structure and match insert and holder. Outer raceway inserts are available on triangular, square and V-shaped bases; we select the base from the raceway R curvature, groove depth, ring structure and chip evacuation.
Standard profile chart
109 standard combinations of nose radius and axial / radial angle are held as standard ground profiles. Custom profiles are made to drawing — send us the ring section and we will quote the form insert and matching holder.
| No. | Rε (mm) | Axial angle (°) | Radial angle (°) |
|---|---|---|---|
| 1 | 0.2 | 15 | 30 |
| 2 | 0.28 | 10 | 45 |
| 3 | 0.3 | 20 | 20 |
| 4 | 0.3 | 12 | 30 |
| 5 | 0.3 | 10 | 15 |
| 6 | 0.33 | 12 | 35 |
| 7 | 0.4 | 12 | 18 |
| 8 | 0.5 | 15 | 15 |
| 9 | 0.5 | 20 | 20 |
| 10 | 0.5 | 32.5 | 32.5 |
| 11 | 0.5 | 12 | 30 |
| 12 | 0.6 | 20 | 20 |
| 13 | 0.6 | 15 | 25 |
| 14 | 0.6 | 12 | 12 |
| 15 | 0.65 | 15 | 30 |
| 16 | 0.65 | 25 | 40 |
| 17 | 0.7 | 12 | 30 |
| 18 | 0.7 | 12 | 18 |
| 19 | 0.7 | 12 | 45 |
| 20 | 0.7 | 22.5 | 22.5 |
| 21 | 0.74 | 12 | 35 |
| 22 | 0.75 | 30.5 | 30.5 |
| 23 | 0.76 | 15 | 30 |
| 24 | 0.8 | 20 | 15 |
| 25 | 0.8 | 12 | 30 |
| 26 | 0.8 | 18 | 24 |
| 27 | 0.8 | 15 | 25 |
| 28 | 0.8 | 15 | 30 |
| 29 | 0.85 | 15 | 30 |
| 30 | 1 | 12 | 28 |
| 31 | 1 | 12 | 25 |
| 32 | 1 | 12 | 45 |
| 33 | 1 | 15 | 30 |
| 34 | 1 | 15 | 30 |
| 35 | 1 | 15 | 25 |
| 36 | 1 | 15 | 22 |
| 37 | 1 | 15 | 20 |
| 38 | 1 | 12 | 30 |
| 39 | 1 | 22.5 | 22.5 |
| 40 | 1.1 | 17.5 | 31 |
| 41 | 1.1 | 10 | 31 |
| 42 | 1.1 | 11 | 31 |
| 43 | 1.1 | 18 | 33 |
| 44 | 1.12 | 11.5 | 31 |
| 45 | 1.14 | 12 | 34 |
| 46 | 1.15 | 15 | 30 |
| 47 | 1.2 | 15 | 20 |
| 48 | 1.2 | 15 | 25 |
| 49 | 1.2 | 15 | 30 |
| 50 | 1.3 | 15 | 30 |
| 51 | 1.3 | 15 | 25 |
| 52 | 1.3 | 10 | 25 |
| 53 | 1.3 | 13 | 27 |
| 54 | 1.3 | 19 | 25 |
| 55 | 1.35 | 10 | 10 |
| 56 | 1.39 | 12 | 25 |
| 57 | 1.4 | 15 | 15 |
| 58 | 1.45 | 15 | 30 |
| 59 | 1.5 | 12 | 27 |
| 60 | 1.5 | 15 | 29 |
| 61 | 1.5 | — | 15 |
| 62 | 1.5 | 30 | 30 |
| 63 | 1.5 | 20 | 20 |
| 64 | 1.52 | 10 | 31 |
| 65 | 1.55 | 15 | 25 |
| 66 | 1.6 | 12 | 30 |
| 67 | 1.6 | 15 | 22 |
| 68 | 1.6 | 15 | — |
| 69 | 1.7 | 10 | 25 |
| 70 | 1.7 | 15 | 20 |
| 71 | 1.75 | 15 | 30 |
| 72 | 1.75 | 20 | 20 |
| 73 | 1.8 | 20 | 30 |
| 74 | 1.85 | 15 | 30 |
| 75 | 1.85 | 12 | 30 |
| 76 | 2 | 35 | 35 |
| 77 | 2 | 15 | 30 |
| 78 | 2 | 11 | 31 |
| 79 | 2 | 12 | 28 |
| 80 | 2 | 10 | 18 |
| 81 | 2 | 15 | 20 |
| 82 | 2 | 15 | 22.5 |
| 83 | 2 | 15 | 25 |
| 84 | 2 | 12 | 30 |
| 85 | 2 | 15 | 25 |
| 86 | 2.1 | 18 | 35 |
| 87 | 2.1 | 15 | 18 |
| 88 | 2.13 | 20 | 22 |
| 89 | 2.13 | 20 | 22 |
| 90 | 2.15 | 20 | 34 |
| 91 | 2.22 | 21.5 | 30 |
| 92 | 2.3 | 15 | 30 |
| 93 | 2.5 | 15 | 25 |
| 94 | 2.5 | 15 | 30 |
| 95 | 2.55 | 10 | 10 |
| 96 | 2.65 | 15 | 30 |
| 97 | 2.8 | 10 | 20 |
| 98 | 3 | 15 | 30 |
| 99 | 3 | 15 | 20 |
| 100 | 3.2 | 15 | 25 |
| 101 | 3.2 | 15 | 25 |
| 102 | 3.4 | 15 | 30 |
| 103 | 3.7 | 15 | 30 |
| 104 | 4 | 12.5 | 25 |
| 105 | 4 | 15 | 30 |
| 106 | 4.2 | 10 | 30 |
| 107 | 5.5 | 10 | 45 |
| 108 | 6.5 | 13.5 | 30 |
| 109 | 6.5 | 15 | 30 |
Need help choosing?
Send us your workpiece material, hardness and machine — our engineers will recommend the right grade and starting cutting data.
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