Colombo USA

Technical Guide – Maintenance

CLEANING

Keep spindle body, fans and airways clean to allow the cooling system to function correctly.

Keep tool tapers, shafts and collets scrupulously clean.

Collet life is

COOL DOWN

Allow cooling system (fan, compressed air or liquid) and bearing pressurization (if fitted) to run for 10 minutes after stopping work.

This minimizes condensation as well as contaminants being drawn into the bearing supports.

WARM UP

Do not apply load to a cold electric spindle. Run the spindle at 9,000 rpm for 10 minutes or until the spindle bearing supports reach 98 degrees F (human body temperature).

This allows bearings, supports and shaft to reach their designed dimensions. Applying load to a cold spindle will cause premature failure of bearings.

TOOLING

Use only balanced tools and tool holders. Rebalance all tools after each sharpening. Vibration from unbalanced tools can rapidly destroy bearings. The balance standard is 1.0 g (ANSI 1940/1).

Replace any worn, scratched or deformed tool holders and collets with new items to prevent tool slip (heat) and imbalance from run-out.

Keep tools sharp to reduce forces, heat and to maintain cut quality.

Monitor increases in electric current to the spindle to detect loss of tool sharpness.

Heat generated from tools can overheat bearing grease, evaporate its essential components and lessen bearing life. Maximum bearing temperature of bearing supports is 150 degrees F. Excess heat will cause tool holders to jam in automatic tool change spindles. Be sure all spindle sensors operate to avoid damage.

CAUTION: All GC spindles are designed to accept only ISO or HSK tool holders. BT tool holders are not interchangeable.
TOOLING DIMENSIONS & DYNAMIC LIMITS
HSK TOOL HOLDERS
TAPER SIZE CLAMP FORCE SPEED
(rpm)
TOOL DIAMETER
(mm, max)
TOOL WEIGHT
(kg, max)
HSK 63-B 18,000 N
4,050 lbf
6000 to 9000
6000 to 9000
300
200
12
8
6000 to 9000 130 5
6000 to 9000 80 5
HSK 63-B 11,000 N
2,475 lbf
6000 to 9000 250 10
9000 to 12000 170 7
12000 to 15000 130 5
15000 to 18000 80 5
HSK 63-F 11,000 N
2,475 lbf
6000 to 9000 250 10
9000 to 12000 170 7
12000 to 15000 130 5
15000 to 18000 80 5
HSK 63-A 11,000 N
2,475 lbf
6000 to 9000 170 10
9000 to 12000 140 7
12000 to 15000 130 5
15000 to 18000 80 5
HSK 63-B 6,800 N
1,530 lbf
6000 to 9000 160 5
9000 to 12000 140 5
12000 to 15000 120 3
15000 to 18000 80 3
HSK 63-F 6,800 N
1,530 lbf
6000 to 9000 160 5
9000 to 12000 140 5
12000 to 15000 120 3
15000 to 18000 80 3
ISO TOOL HOLDERS
TAPER SIZE CLAMP FORCE SPEED
(rpm)
TOOL DIAMETER
(mm, max)
TOOL WEIGHT
(kg, max)
TOOL LENGTH
Approx (mm, max)
ISO 40 6,000 N
1,350 lbf
6000 to 9000 150 10 150
9000 to 12000 130 7 150
12000 to 15000 110 5 150
15000 to 18000 80 5 125
ISO 30
Heavy Duty (FB3)
5,000 N
1,125 lbf
6000 to 9000 140 5 150
9000 to 12000 130 5 150
12000 to 15000 110 3 150
15000 to 18000 80 3 125
ISO 30
Medium Duty (FP1)
3,500 N
785 lbf
6000 to 9000 140 4 125
9000 to 12000 130 4 125
12000 to 15000 110 2,5 100
15000 to 18000 80 2,5 75
ISO 25 2100 N
475 lbf
6000 to 9000 120 3
9000 to 12000 90 2,5
12000 to 15000 60 2
15000 to 18000 30 1,5
ISO 20 1800 N
405 lbf
6000 to 9000 60 2,5
9000 to 12000 40 2
12000 to 15000 30 1,5
15000 to 18000 20 1
ISO 15 835 N
190 lbf
6000 to 9000 50 2
9000 to 12000 30 1,5
12000 to 15000 20 1
15000 to 18000 10 0,5