Turning Between Centres; Bowl Turning - Powermatic 4224B Operating Instructions Manual

Speed recommendations
Workpiece
Roughing
Diameter
RPM
mm
< 50 1500
50-100 700
100-150 500
150-200 370
200-250 300
250-300 250
300-350 220
350-400 180

6.4 Turning between centres

With a ruler locate and mark the centre on each end.
Put a dimple in each end of the shock. Extremely hard
woods may require kerfs cut into the spur drive end of
stock
(see Fig 21).
Fig 21
The spur drive centre locks into the cleaned spindle taper
and can be removed with the knockout rod (Fig 22)
Fig 22
Mount the centred work piece between the spur drive
centre and the tailstock mounted live centre
General
Finishing
Cutting
RPM
RPM
3200 3500
1600 2500
1100 1600
800 1200
650 1000
500 800
450 700
400 600
Turn the tailstock hand wheel until the live centre well
penetrates the workpiece. Reverse the hand wheel by one
quarter turn and lock the tailstock spindle.
Turn the workpiece by hand to see if it rests securely
between centres and can be rotated freely.
For turning between centres the tool rest is set
approximately 3mm higher than centre line (Fig 23 and
24).
Fig 23
Fig 24

6.5 Bowl turning

Turn outside of bowl between centres.
Turn a short tenon the size of the hole in the faceplate
(T, Fig 25). This will allow centring the workpiece.
Fig 25
Mount the work piece (A, Fig 26) directly to the face plate
using 4 wood screws (C) from the back. Be careful to use
screws short enough not to interfere with the cutting
process but long enough to hold the workpiece securely to