User:Stever/boxford/speedsnfeeds

From rLab Wiki
< User:Stever
Revision as of 13:09, 4 April 2022 by Stever (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigationJump to search

All recipes from personal experience and tested on the Boxford 260VMC, Categories of machining are Roughing, Finishing, Slotting, Engraving, Drilling

Recommended surface speeds

Tool Speeds (m/min)
Material HSS Cobalt Carbide
Plastic 15 15 Not recommended
Aluminium 100 150 300
Brass 75 125 200
Steel 25 35 65
Stainless Steel 20 25 40
Titanium alloys Not recommended Not recommended 15
Tool Steels Not recommended 10 30

NOTE : THESE ARE APPROXIMATE RECOMMENDATIONS - YOU WILL NEED TO RESEARCH ELSEWHERE AND GET EXPERIENCE IN ORDER TO PICK SPEEDS PROPERLY - IF THE TOOL MANUFACTURER'S RECOMMENDATIONS DIFFER FROM THIS TABLE, USE THE MANUFACTURER'S FIGURES INSTEAD

Key

Colour Meaning
Blue Not (proven) a maximum, could do more
Green A demonstrated maximum, any more will break tools
Red Known to be excessive, will break tools


Aluminium

Roughing

Tool Size Tool Typetype Material Coating

Surface speed

(RPM)

DOC WOC

FTP

(feed rate)

Comment
12mm 4-flute flat end mill HSS Uncoated 100m/min 10mm 4mm

0.03

(250mm/min)

Noisy and spindle only just copes, definitely a maximum, use conventional milling only. Limited by spindle power, not tool endurance
5mm 4-flute flat end mill HSS Uncoated

40m/min

(2500rpm)

5mm 1.5mm

0.02

(200mm/min)

Good finish, not a maximum could have done more
3mm 4-flute flat end mill HSS Uncoated

28m/min

(3000rpm)

1.5 mm 1.4mm

0.0075

(90mm/min)

Good finish, not a maximum could have done more
2mm 2-flute ball nose end mill HSS TiAlN coated

19m/min

(3000rpm)

1mm 0.5mm

0.02

(120mm/min)

Works OK, 150mm/min is too much

Brass

Roughing

Tool Size/type Material Coating

Surface speed

(RPM)

DOC WOC

FTP

(feed rate)

Comment
4mm 2-flute flat end mill HSS Uncoated

38m/min

(3000rpm)

1 mm 1.8mm

0.025

(150mm/min)

Nice surface finish, almost certainly could do more depth

Finishing

Tool Size/type Material Coating

Surface speed

(RPM)

DOC WOC

FTP

(feed rate)

Comment
1mm 3-flute flat end mill Carbide TiAlN coated

9m/min

(3000rpm)

1.2 mm 0.95mm

0.0022

(20mm/min)

Too much WOC, breaks cutters
2mm 4-flute flat end mill HSS Uncoated

19m/min

(3000rpm)

3 mm 0.8mm

0.01

(120mm/min)

Nice surface finish, might be able to go a little faster but was making noise

Engraving

Tool Size/type Material Coating

Surface speed

(RPM)

DOC WOC

FTP

(feed rate)

Comment
60 degree 0.3mm tip engraver 1/8" shank solid carbide TiAlN coated

25m/min (calculated)

(2500rpm)

N/A 0.6mm

0.02

(50mm/min)

Cutter sometimes breaks, probably should try higher rpm
90 degree 0.3mm tip engraver 1/8" shank solid carbide TiAlN coated

30m/min (calculated)

(3000rpm)

0.25 0.5mm

0.01

(30mm/min)

Seems to work, could maybe do deeper or faster?

Slotting

Tool Size Tool type Material Coating

Surface speed

(RPM)

DOC

FTP

(feed rate)

Comment
4mm 4-flute flat end mill HSS Uncoated

31m/min

(2500rpm)

1mm

0.015

(150mm/min)

Using ramp profile, might be able to do more but surface finish is not good
2mm 4-flute flat end mill HSS Uncoated

19m/min

(3000rpm)

1.5mm

0.01

(120mm/min)

Snapped tool
2mm 3-flute flat end mill Solid carbide Uncoated

19m/min

(3000rpm)

1.5mm

0.015

(90mm/min)

Snapped tool
2mm 2-flute flat end mill HSS Uncoated

19m/min

(3000rpm)

1.0mm

0.008

(50mm/min)

So far so good, working up the feed rate
3mm 4-flute flat end mill HSS Uncoated

28m/min

(3000rpm)

1.5mm

0.005

(60mm/min)

FTP could be higher

Low-Carbon (Mild) Steel

Roughing

Tool Size Tool type Material Coating

Surface speed

(RPM)

DOC WOC

FTP

(feed rate)

Comment
4mm 4-flute flat end mill HSS Uncoated

20m/min

(1600rpm)

5mm 1.8mm

0.02mm

(130mm/min)

Cut very well, probably can do more

Drilling

Tool Size/type Material Coating

Surface speed

(RPM)

FTP

(feed rate)

Comment
4 mm 2-flute jobber drill Cobalt Steel TiN

20m/min

(1600rpm)

0.04mm

(63mm/min)

Cut well, used pecking profile, probably could have done more feed

"Special" materials

H-13 Tool Steel

Roughing

Tool Size/type Material Coating

Surface speed

(RPM)

DOC WOC

FTP

(feed rate)

Comment
6mm 4-flute flat end mill solid carbide TiAlN coated 35m/min 7mm 0.5mm

0.04mm

Width is at maximum, depth might be deeper
1mm 3-flute flat end mill Solid Carbide TiAlN coated

9.4m/min

(3000rpm)

0.5mm 0.5mm

0.0022mm

(20mm/min)

Might handle more but only one test was made

Finishing

Tool Size/type Material Coating

Surface speed

(RPM)

DOC WOC

FTP

(feed rate)

Comment
20 degree 0.3mm tip engraver 1/8" shank solid carbide TiAlN coated

30m/min (calculated)

(3000rpm)

0.5 mm 0.15mm

0.0026

(8mm/min)

Too much, breaks the tip off

Drilling

Tool Size/type Material Coating

Surface speed

(RPM)

FTP

(feed rate)

Comment
6mm 2-flute jobber drill HSS TiN

14m/min

(730rpm)

0.02mm

(15mm/min)

Was in danger of stalling spindle, definitely the maximum size that can be drilled in this material