Application indications and solutions for reaming

Solution

• Cutting speed is too high

• Feed rate is too high

• Insufficient lubricating coolant delivery

• Incorrect lubricating coolant composition

• Point is too short or very uneven

• Tool or machine spindle rotation incorrect

• Due to low-density or flexible structure, the working material enlarges

• Reduce cutting speed

• Reduce feed rate

• Ensure good lubricating coolant delivery

• Ensure correct lubricating coolant composition

• Lengthen point or reduce point angle

• Centrally clamp or guide the reamer. Use a reamer chuck

• Reduce reamer diameter

• Cutting speed is too low

• Feed rate is too low

• Chip removal rate is too low

• Point is too long

• Tool is ground smooth

• The working material is of high density or has an inflexible structure

• Reamer of insufficient size

• Too much heat created when reaming. Shrinking borehole

• Tool diameter too small

• Increase cutting speed

• Increase feed rate

• Increase machining allowance

• Select a smaller point

• Check the tool and replace in good time

• Increase reamer diameter

• Select a higher allowance

• Increase lubricating coolant delivery

• Select the correct diameter

• Insufficient size

• Select a larger diameter

• Incorrect positioning in the machine spindle

• Alignment error between the tool and the borehole

• Asymmetrical point angle

• Incorrect tool run-out

• Clearance angle too great

• Point is not round

• Insufficient guide

• Check the spindle and correct its position

• Use front-cutting reamers

• Re-sharpen point angle

• Centrally clamp tool, use reamer chuck and guide

• Reduce clearance angle when re-sharpening

• Evenly sharpen and round the point

• Worn tool

• Front rake angle is too small

• Cutting speed is too low

• Feed rate is too low

• Workpiece tends to stick (built-up edge)

• Cutting exit is sharp-edged

• Insufficient lubricating coolant delivery

• Incorrect lubricating coolant composition

• Cutting is uneven

• Defective point

• Replace or re-sharpen tool in good time

• Re-sharpen correctly

• Increase cutting speed

• Increase feed rate

• Increase clearance angle and front rake angle; use highly fluid lubricant

• Round and smooth the borehole exit

• Ensure good lubricating coolant delivery

• Ensure correct lubricating coolant composition

• Grind the point and guide piece to an evenly round shape or to a tapered shape

• Finely smooth or lap the point round and smooth the guide piece joint

• Borehole is too narrow

• Bevel width is too great

• Shaft is too short

• Worn tool

• Reduce material cross-section

• Check the tool and replace if necessary

• Check the tool and replace if necessary

• Replace or re-sharpen tool in good time

• Feed rate when removing the reamer from the borehole is too high

• Reduce feed rate shortly before passing through or use even feed rate

• Incorrect position between shaft and clamping device

• Keep shaft and clamping device clean and undamaged