
SMD Type Large Hole Type
大径MTL型 大形ケーシングなどに用いられる高延性材料にも最適な刃型設計For Large Holes Tool edge design ideal for malleable material used for large casings, etc. Edge design suitable for malleable material commonly used
for large hole drilling.
Aims to reduce thrust under heavy cutting
| Improved chip management | 低い機械剛性・クランプ剛性にも対応した | |
| for highly malleable materials | Designed to handle low | |
| Large Helix Angle Design | machine and clamp rigidity大径専用刃先処理 | |
| Edge Treatment Exclusively | ||
| 延性の高い材質にも切りくず処理性を向上させた | 高価なワークに対し突発的な欠損を防ぐfor Large Diameters | |
| 強ネジレ角設計 | Prevents unexpected breakage高靭性母材採用 |
when working with expensive materials Robust Substrate ■加工面精度Machined Surface Accuracy Cutting Force Comparison (Thrust)■切削抵抗(スラスト) 被 削 材:SM490(建機用ベースプレート) 被 削 材:SS400(重ね板)
ドリルサイズ:Work Material:Ǿ33.0mm×5D用St 52-3 (Base substrate for construction use) 度 Work Material:ドリルサイズ:Ǿ37.5mm×5D用St 42-2 (Laminated plates)
切削条件:Drill Size:=120m/min, =0.25mm/revØ33,0mm x 5D Drill Size:切削条件: =90m/min, =0.35mm/rev Ø37,5mm x 5D 定加工
| c | 高い穴精 | c | ||
| 切削環境:エマルションCutting Conditions:v =120m/min, f=0,25mm/rev | Cutting Conditions:切削環境:エマルションv=90m/min, f=0,35mm/rev |
| c | 大径でも | c | 工でも安 | ||
| Cutting Environment: Emulsion Type | Cutting Environment: Emulsion Type重ね板加 | ||||
| High drilling accuracy with large diametersǾ33.15 | Stable even when machining laminated plates |
測定ヶ所① ① 切りくず処理良好
Ǿ33.10 Good Chip Control Cutting Force (N m)
測定ヶ所② ② Ø33,15 10,000 Ǿ33.05 Measured Point (1) (1)
Ø33,10 8,000 Measured (2) ǾExit33.00 Point (2) Ø33,05 6,000 Measured出口 Ǿ32.95 Ø33,00 Directions 4,000 測定方向 Ǿ32.90Ø35,95 Entrance 2,000 入口 32,90 Ǿ32.85Ø
入口 中間 出口 0
| 32,85 | 5 | 10 | 15 | 20 | 25 |
| Ø |
Entrance Intermediate Exit Depth of cut (mm)
Recommended Cutting Conditions vC=Cutting Speed (m/min) f=Feed Rate (mm/rev)
| Work Mat | erial | Soft Steel (~HB250) | General Steel (HB250~320) | Hardened Steel (HRC45) | Stainless Steel (~HB200) | Grey Cast Iron | Ductil Cast Iron |
| Recommende Drill Ø (mm) | d Head Cutt. Conditions | MTLType | MTLType | MTLType | MTLType | MTLType | MTLType |
| ~ 36,5 | vc | 60 ~ 120 (40 ~ 80) | 60 ~ 120 (40 ~ 80) | 40 ~ 80 (30 ~ 60) | 40 ~ 80 (30 ~ 60) | 50 ~ 100 (40 ~ 90) | 50 ~ 90 (40 ~ 70) |
| f | 0,25 ~ 0,4 | 0,2 ~ 0,35 | 0,15 ~ 0,3 | 0,15 ~ 0,25 | 0,25 ~ 0,45 | 0,25 ~ 0,35 | |
| 60 ~ 120 | 60 ~ 120 | 40 ~ 80 | 40 ~ 80 | 50 ~ 100 | 50 ~ 90 | ||
| ~ 42,5 | vc | (40 ~ 80) | (40 ~ 80) | (30 ~ 60) | (30 ~ 60) | (40 ~ 90) | (40 ~ 70) |
| f | 0,25 ~ 0,4 | 0,2 ~ 0,35 | 0,15 ~ 0,3 | 0,15 ~ 0,25 | 0,25~ 0,45 | 0,25 ~ 0,35 |
Note: Where machining and work clamp rigidity are good, conditions may be increased up to the maximum. For 8D drills, please use feed rates stated within the ( ). Before drilling 8D holes, a guide hole of similar diameter must be made.