reaming in drill press

how much reaming alliance would you leave on a 1/2 in hole

1/8 times

what is the difference between a checking and a rose reamer

a checking reamer is a finished reamer, the fluted part is cylindrical and the land are relieved. a rose reamer is a roughing reamer. it can remove a considerable amount of material the body has a slight back taper and no relief on the lands. all cutting takes place on the chamfered end

what is a jobber's reamer

a jobber's reamer is a finishing reamer like a chucking reamer but has a longer fluted body

how does the surface finish of a hole affect its accuracy

an accurate hole size cannot be obtained without a high quality surface finish

how does the cutting speeds compare for drilling and reaming the same material

as a general rule the cutting speed used to ream a hole is about one third to half of the speed used to drill a hole of the same size in the same material

what causes a bellmouthed hole

bell mouthed hole are usually caused by misaligned reamer and workpiece set up. piloted reamers, bushing, or a floating holder may correct this problem

when are carbide tipped reamer used

carbide tipped reamers are recommended for long producing run where high abrasive material are reamed

why is vibration harmful to carbide tipped reamer

cemented carbide are hard but also brittle. the slightest amount of chatter or vibration may chip the cutting edges.

what can be done to overcome chatter

chatter may be eliminated by reducing the speed, increasing the feed or using a piloted reamer

what is the purpose of using cutting fluid while reaming

cutting fluid cool the tool and workpiece and act as a lubricate

how is a machine reamer identified verse a hand reamer

machine reamers are identified by the design of the shank either a straight or tapered shank and usually a 45 degreee chamfer on the cutting end

what will cause oversized hole

oversized holes may be caused by a bent reamer shank or buildup on the cutting edges, check also to see if there is a sufficient amount of coolant and if the correct kind is being used

why are shell reamers used

shell reamer are more economical to produce than solid reamer especially in larger size

how can loot surface finish be overcome

surface finish can be improved by decreasing the feed and checking the reaming alliance too much or not enough material will cause poor finish. use a large volume of coolant

how do the feed rates compare between drilling and reaming

the feed rate, when reaming as compared with drilling the same material, is approximately two to three times as great.