Hafco Metalmaster HM-46B, Operation Manual

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OPERATION MANUAL

 Symptom

Possible Cause 

Possible Solution

Tool loose in
spindle.

1. Tool is not fully drawn up into spindle taper.
2. Debris on tool or in spindle taper
3. Taking too big of a cut.

1. Spindle speed/feed rate is too fast.
2. Cutting tool is too small.
3. Cutting tool getting too hot.
4. Taking too big of a cut.
5. Spindle extended too far down.

1. Table locks not tight.
2. Workpiece not secure.
3. Spindle speed/feed rate is too fast.

4. Spindle extended too far down
.
5. Quill lock lever not tight.
6. Gibs too loose in table.

1. Table locks are tightened down.
2. Chips have loaded up on ways.
3. Ways are dry and need lubrication.
4. Table limit stops are interfering.
5. Gibs are too tight.

1. Headstock lock(s) or gib is at fault.

2. Headstock leadscrew is binding.

3. Gib is too tight.

1. Spindle speed/feed rate is too fast.

2. Dull or incorrect cutting tool.

3. Wrong rotation of cutting tool

4. Workpiece not secure.

5. Spindle extended too far down.

1. Table and spindle are not at 90° to each other.

2. Table travel is inconsistent

1. Poor spindle bearing lubrication.

2. Spindle bearings too tight.

3. Mill operated at high speeds for extended

     period.

1. Faulty Motot

2. Faulty Bearings

1. Tighten drawbar.
2. Clean tool and spindle taper.
3. Lessen depth of cut and allow chips to clear.

1. Set spindle speed correctly or use slower feed rate
2. Use larger cutting tool and slower feed rate.
3. Use coolant or oil for appropriate application.
4. Lessen depth of cut and allow chips to clear.
5. Fully retract spindle and raise table. This increases    
    rigidity.

1. Tighten table locks.
2. Properly clamp workpiece on table or in vise.
3. Set spindle speed correctly or use slower feed rate
     (Page 20,21).
4. Fully retract spindle and raise table This increases    
```rigidity.
5. Tighten quill lock lever.
6. Tighten gibs.

1.   Fully release table locks .
2.   Frequently clean away chips or debris.
3.   Lubricate ways.
4.   Make sure that table limit stops are not in the way
5.   Adjust gibs .

1.   Loosen/replace lock lever and adjust gib 

2.   Clean and relubricate headstock leadscrew and

      gears 

3.  Adjust gib.

1. Set spindle speed correctly or use slower feed rate

    (Page 20,21).

2. Sharpen cutting tool or select one that better suits

     the operation.

3. Check for proper cutting tool rotation.

4. Properly clamp workpiece on table or in vise.
5. Fully retract spindle and raise table.  This increases        

    rigidity.

1. Square the spindle.

2. Adjust gibs .

1. Replace spindle bearings.

2. Properly adjust spindle bearing preload.

3. Allow mill to cool.

1. Replace or repair motor

2. Replace bearings.

Workpiece or tool
vibrates or chatters
during operation.

Table is hard to
move.

Headstock is hard 

to raise.

Bad surface finish

Cutting results not

square.

Spindle overheats.

Noisy Operation

5.4 TROUBLESHOOTING

Breaking tools or
cutters.

07/11/2019

Instructions Manual for HM-46B (M138D)

24