Chip Inspection Chart; Blade Speed Chart - Grizzly G0717 Owner's Manual

the best method for choosing the cutting speed and feed rate for a cutting operation is to inspect the chips
created by the cut. these chips are indicators of what is commonly referred to as the "chip load." refer to
thin & curled
the chip inspection chart below to evaluate chip characteristics and determine whether to adjust feed rate/
thin & curled
thin & curled
pressure, blade speed, or both.
thin & curled
thin & curled
short, hard & thick
Chip
thin & curled
short, hard & thick
appearance short, hard & thick
thin & curled
short, hard & thick
thin & curled
thick, hard & strong short, hard & thick
short, hard & thick
thick, hard & strong
thick, hard & strong
short, hard & thick
thick, hard & strong
short, hard & thick
thick, hard & strong
thick, hard & strong
thick, hard & strong
thick, hard & strong
thick, hard & strong
thick, hard & strong
thick, hard & strong
thick, hard & strong
hard & thin thick, hard & strong
hard & thin
thick, hard & strong
hard & thin
thick, hard & strong
hard & thin
thick, hard & strong
thin & straight
hard & thin
thin & straight
hard & thin
thin & straight
hard & thin
thin & straight
powdery
hard & thin
powdery
thin & straight
powdery thin & straight
powdery
thin & straight
thin & curled tightly
thin & straight
powdery
thin & curled tightly
powdery
thin & curled tightly
powdery
thin & curled tightly
powdery
thin & curled tightly
thin & curled tightly
thin & curled tightly
thin & curled tightly
the chart in figure 36 offers blade speed guidelines for various metals in feet per minute (FpM) and meters
per minute (M/Min). Choose the closest available speed on the machine, then adjust the feed rate as neces-
sary, using the appearance of the chips produced as a guide. refer to the Chip inspection Chart above for
recommendations on adjusting feed rate or blade speed based on the appearance of the chips produced.
Speed FPM
Material
(M/Min)
Carbon
196~354
Steel
(60) (108)
Angle 180~220
Steel (54) (67)
180~220
Thin
(54) (67)
Tube
220~534
Aluminum
(67) (163)
Alloy
Copper 229~482
Alloy (70) (147)
Model g0717 (Mfg. since 9/10)

Chip inspection Chart

Chip Chip
Description Color
thin & Curled silver
hard, thick &
Brown or Blue
short
hard, strong &
Brown or Blue
thick
hard, strong, silver or light
Curled & thick Brown
hard, Coiled &
silver
thin
straight & thin silver
powdery silver
Coiled, tight &
silver
thin
figure 35. Chip inspection chart.

Blade speed Chart

CUTTING SPEED RATE RECOMMENDATION
Speed FPM
Material
(M/Min)
203
Tool Steel
(62)
High-Speed 75~118
(25) (36)
Tool Steel
Cold-Work 95~213
Tool Steel (29) (65)
203
Hot-Work
(62)
Tool Steel
203~213
Oil-Hardened
(62) (65)
Tool Steel
figure 36. dry cutting blade speed chart.
Blade
speed
good
increase
increase
good
increase
good
decrease
good
Speed FPM
Material
(M/Min)
111~321
Alloy
(34) (98)
Steel
246
Mold Steel
(75)
Water
242
Hardened
(75)
Tool Steel
Stainless 85
(26)
Steel
85-203
CR Stainless
(26) (62)
Steel
feed Rate/ Other
pressure actions
good
decrease
decrease
decrease Check Blade
slightly pitch
Check Blade
decrease
pitch
increase
increase
Check Blade
decrease
pitch
Speed FPM
Material
(M/Min)
Free Machining
150~203
Stainless Steel (46) (62)
108~225
Gray
(33) (75)
Cast Iron
Ductile
65~85
Austenitic
(20) (26)
Cast Iron
Malleable
Cast Iron
Plastics
321
(98)
220
(67)
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