Cartridge & block cartridge spindles
A wide selection for milling, drilling, boring and other rotational processes
Every SKF Precision Technologies precision spindle is built from the highest
quality materials and components to deliver high performance
and long life.
- 8 sizes of spindles:
- 2 small light duty spindles: 1250 & 1875
- 6 machine tool duty spindles: 2750, 3500, 4000, 5500,
6500 & 8000 Plus special orders
- Nine standard interface nose styles
- High-quality alloy steel shaft
- Precision grade ABEC-7 angular contact ball bearings
- Close-grain, stress-relieved cast iron housings
- Precision runout tolerances down to .0001 T.I.R. are standard
- Highly effective standard sealing designs:
- High speed models feature labyrinth seals with flinging
grooves and a gravity drain.
- Lower speed models feature Nitrile rubber V-ring
seals.
- Special materials and sealing methods can be utilized
with any SKF Precision Technologies spindle, as may be required by unusual environmental
situations.
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From
1.25" to 8" cartridge sizes.
From 1/3 to 30 horsepower
Up to 27,000 RPM
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Spindle engineering information
For comprehensive technical specifications and descriptions, please download the complete 68-page cartridge and block catalog (4.18 MB). For detailed application examples, visit our applications, articles and testimonials page.
Download the maintenance flyer for tips on the best care and handling of high precision spindles.
General cartridge and block spindles specifications
Click here to get complete catalog with specifications (4.18 MB)
|
Model
|
Maximum thrust (lbs.)
|
Maximum RPM
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Radial stiffness at nose (lbs./in.)
|
|
1250
|
36
|
14,000
|
5,060
|
|
1875
|
45
|
15,800
|
33,444
|
|
2750
|
655
|
27,200
|
300,000
|
|
3500
|
1,191
|
17,600
|
820,000
|
|
4000
|
1693
|
14,400
|
950,000
|
|
5500
|
2,625
|
12,000
|
1,380,000
|
|
6500
|
3,790
|
10,400
|
1,700,000
|
|
8000
|
4,700
|
8,000
|
2,630,000
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Belt driven spindles & motor assembles
Belt driven spindles & motor assembles
SKF Precision Technologies cartridge and block spindles are available as belt driven motorized assemblies. Standard motors are 230/460 volt 3-phase 60-Hz and have a totally enclosed fan-cooled NEMA frame.
All SKF Precision Technologies belt driven motorized spindles operate at a fixed speed and incorporate a direct drive timing belt for positive power transmission.
Spindle RPMs vary according to spindle size and HP. Smaller units range up to 13,000 RPM, while larger spindles range up to 30 HP.
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General cartridge and block belt-driven/motorized spindles specifications
Click here to get complete catalog with specifications (4.18 MB)
|
Model
|
Spindle RPM
|
Motor
|
|
Minimum
|
Maximum
|
RPM
|
HP
|
|
1875
|
800
|
10,500
|
1160
|
1/2
|
|
2750
|
800
|
7,700
|
3500
|
3
|
|
3500
|
650
|
6,450
|
3500
|
3
|
|
4000
|
550
|
6,400
|
3500
|
7 1/2
|
|
5500
|
500
|
6,450
|
3500
|
7 1/2
|
|
6500
|
550
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4,850
|
3500
|
20
|
|
8000
|
550
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4.400
|
3500
|
30
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Belt-driven spindle, motor & vertical slide assembly
Vertical travel spindle units combine a belt-driven motorized spindle with a slide assembly.
Saddle tracking accuracy is .0005 inch per 3 feet of travel. |
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General motorized vertical travel spindles specifications
Click here to get complete catalog with specifications (4.18 MB)
|
Model
|
Spindle RPM
|
Motor
|
|
Minimum
|
Maximum
|
RPM
|
HP
|
|
2750
|
500
|
7,700
|
3500
|
3
|
|
3000
|
500
|
7,000
|
3500
|
3
|
|
4000
|
550
|
7,000
|
3500
|
7 1/2
|
|
5500
|
550
|
6,450
|
3500
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7 1/2
|
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6500
|
550
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4,300
|
3500
|
20
|
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