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Ordinary taper shank machine reamer H8 new standard M34 to 65 general 43 material customized non-standard custom-made new products

Execute GB1133-84/GB1133-73. common material: W4341

discount 70% in 2018-09-25 to 2018-09-27
price: USD$ 196.00
freight :USD$18.00,(Express)
freight :USD$7.00,(Postal parcel)
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Common taper shank machine reamer

W4341 material

D old standard

D4 old standard

 D5 old standard

 H7  The new standard

H8 new standard

H9 new standard


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Accuracy of machine reamer:D/D4 /H7/H8/H9


D/D4Class isOld standard accuracy



H7/H8/H9yesNew standard precision


Reamer tolerances are generally increased in size (commonly known as silk)

Grade D increases 0.01 mm.D4Increase 0.02 mm

H7Increase 0.005 - 0.01 mm

H8Increase 0.001 - 0.015 millimeters

H9Enlarge0.02 mm.The blade is H long than D prefect