1. Contour Bandsaw Parts and Accessories
Unit 36

2. Vertical Bandsaw Latest machine tool to be developed
Early 1930s
Widely accepted by industry
Fast and economical method of cutting metal and other materials
Continuous cutting action on workpiece

3. Advantages of the Vertical Bandsaw
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

4. Advantages of the Vertical Bandsaw
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

5. Advantages of the Vertical Bandsaw
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

6. Contour Bandsaw Parts Fabricated from steel Basic parts Base Column
Head

7. Base Supports column and houses drive assembly
Provides drive for saw blade
Lower Pulley
Supports and drives saw band
Driven by variable-speed pulley
Can be adjusted to various speeds by variable speed handwheel

8. Base Table Lower saw guide Filler plate slide and center plate
Attached to base by means of trunnion
Can be tilted 10 to left and 45 to right
Turned by table tilt handwheel
Lower saw guide
Attached to trunnion
Supports blade to keep it from twisting
Filler plate slide and center plate
Removable and mounted in table

9. Column
Supports head, left-hand blade guard, welding unit and variable speed handwheel
Variable speed handwheel
Used to regulate speed of bandsaw blade
Blade tension indicator and speed indicator
Welding unit
Used to weld, anneal, and grind saw blade
Column

10. Head Upper pulley Upper saw guide Saw guard and air nozzle
Supports saw band, adjusted by tension and tracking controls
Upper saw guide
Attached to saw guidepost
Supports/guides saw blade to stop twisting
Saw guard and air nozzle
Keeps area free from chips

11. Types of Band Machines Smaller capacity Larger capacity
has two band carrier wheels
Used in many toolrooms
Larger capacity
Have three carrier wheels
Both upper wheels may be tilted
When blade becomes too short, can be shortened to fit over upper and lower band carrier wheels

12. Bandsaw Common Applications
Notching
Sections of metal removed in one piece
Slotting
Quick and accurate without expensive fixtures

13. Bandsaw Common Applications
Three-dimensional shaping
Simply follow layout lines
Radius cutting
Internal or external contours
Internal sections removed in one piece

14. Bandsaw Common Applications
Splitting
Accomplished quickly with minimum waste
Angular cutting
Work clamped at any angle
Table may be tilted

15. Coolants Power-feed models have cooling system Mist coolant system
Circulates and discharges coolant against faces of blade and work
Mist coolant system
Uses air to atomize coolant and direct it (efficient)
Recommended for high-speed machining of nonferrous metals
Grease-type lubricants and coolants may be applied directly to blade on machines with no system

16. Power Feed Work and table fed toward blade by hydraulic system
Fixed-table machines use gravity to provide steady mechanical feeding pressure
Allows operator to use both hands to guide
Work forced into blade by cables, pulleys, and weights
Force
Varied up to about 80 lb. (regular lbs)

17. Bandsaw Blade Types Three kinds of blades commonly used
Carbon-alloy
High-speed steel
Tungsten-carbide tipped
For best results, must consider
Kind of saw-blade material and tooth form
Pitch set
Width
Gage needed

18. Tooth Forms Precision (regular) Claw (hook) Buttress (skip)
Most generally used
0º rake angle, 30º back clearance
Used for fine finish
Claw (hook)
Positive rake on cutting face
Faster cutting, longer lasting than buttress
Buttress (skip)
Teeth spaced farther apart
Tooth angles same as precision teeth
Used on thick work sections

19. Pitch Numbers of teeth per standard reference length
Inch standard = No. teeth/inch
Metric standard = No. teeth/25 mm
Thickness of material to be cut determines pitch of blade to use
Coarse: thick, Fine: thin
Two teeth in contact with work at all times

20. Set
Amount teeth offset on either side of center to produce clearance for back of band
Wave set
Group of teeth offset to right and next to left
Structural steel or pipe
Straight set
One tooth offset to right and next to left
Light nonferrous castings
Raker set
One tooth offset to right, one to left, and third tooth straight

21. Width Wide blade used for straight, accurate cuts
Narrow blades used to cut small radii
Radius charts show proper width of blade are found on all bandsaws
Choose widest blade that can cut smallest radius

22. Gage Thickness of saw blade Thick blades stronger than thin blades
Thickest blade possible should be used for sawing tough material
Standardized according to blade width
½ in wide are .025 in. thick
5/8 in. and ¾ in. wide are .032 in. thick
1 in. wide are .035 in. thick

23. Calculate Length of Saw BladeCD
Packaged in coils 100 to 150 ft. in length
Cut length required and weld ends
Twice center distance between each pulley and add it it one pulley's circumference D
Blade length = 2 (CD) + µ D