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US 5,238,335 AGranted
Reamer
AssigneeToshiba Tungaloy Co., Ltd.
InventorTakuji Nomura
Life of this patent
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AssigneeToshiba Tungaloy Co., Ltd.
InventorTakuji Nomura
Estimating the term…
A reamer includes a shank portion and a reamer head fixed to the shank portion. A cutting blade is mounted on the reamer head to project axially forwardly from the front end of the reamer head. A bearing guide pad is mounted on the reamer head circumferentially spaced from the cutting blade downstream with respect to the rotating direction of the reamer, and a sizing guide pad is mounted on the reamer head substantially diametrically opposed to the cutting blade. The axial lengths (L2) of the guide surfaces of the bearing guide pad and the sizing guide pad are both not larger than the axial length (L1) of the circle land of the cutting blade, the axial length (L1) of the cutting blade is not larger than the diameter (D) of the reamer, and the width (W2) of the sizing guide pad is not larger than the width (W1) of the bearing guide pad. The axial lengths (L2) of the guide surfaces of the guide pads are preferably 5 mm to 15 mm where the diameter of the reamer is 5 mm to 100 mm.
A reamer comprising a shank portion, a reamer head fixed to the shank portion, a cutting blade having a chamfer and a circle land forming an outer surface of said cutting blade, said cutting blade being positioned on the reamer head to project axially forwardly from a front end of the reamer head, a bearing guide pad provided on the reamer head circumferentially spaced from the cutting blade downstream with respect to a rotating direction of the reamer, and a sizing guide pad provided on the reamer head substantially diametrically opposed to the cutting blade, wherein the axial lengths of the guide surfaces of the bearing guide pad and the sizing guide pad are both not larger than the axial length of the circle land of the cutting blade, the axial length of the circle land of the cutting blade is not larger than the diameter of the reamer, and the width of the sizing guide pad is not larger than the width of the bearing guide pad.
A reamer comprising a shank portion, a reamer head fixed to the shank portion, a cutting blade having a chamfer and a circle land forming an outer surface of said cutting blade, said cutting blade being positioned on the reamer head to project axially forwardly from a front end of the reamer head, a bearing guide pad provided on the reamer head circumferentially spaced from the cutting blade downstream with respect to a rotating direction of the reamer, and a sizing guide pad provided on the reamer head substantially diametrically opposed to the cutting blade, wherein said shank portion is provided with a plurality of auxiliary guide pads circumferentially spaced from each other and extending in the axial direction, heights of the auxiliary guide pads being such that the guiding diameter determined by the distance between the outer surfaces of the auxiliary guide pads and the rotational axis of the shank portion is smaller than the cutting diameter determined by the distance between the outer surface of the sizing guide pad and the outer surface of the cutting blade, and the axial lengths of the guide surfaces of the bearing guide pad and the sizing guide pad are both not larger than the axial length of the circle land of the cutting blade, the axial length of the circle land of the cutting blade is not larger than the diameter of the reamer, and the width of the sizing guide pad is not larger than the width of the bearing guide pad.
Dependencies are inferred from the claim text.