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Aluminum ball cage with anti-skid unit
Standard: 7611 Ø16
Thanks to its low weight and good thermal conductivity, this universally applicable aluminum ball cage is particularly suitable for high stroke frequencies of up to > 2500 strokes/min. Positioning is facilitated by a mounting aid.
Advantages
- The backlash-free preload (use of columns, balls and bushings with a suitable fit) enables high-precision guidance of the stroke movements
- The tight fitting of rolling elements ensures high load capacity and rigidity
- Patented caulking of the rolling elements ensures a long service life
- Easy handling and maintenance
- Suitable for minimum quantity lubrication
Caulking
Caulking of the balls (patented)
- Ball is held over a large part of its circumference
- Better holding force of the ball
- Reduced radial ball play
- Significantly reduced jerky load when the rolling element enters the preload
The special, patented flat caulking of the rolling elements in the cage, in which the balls are held over a large part of their circumference, increases the holding force and reduces the risk of rolling elements being knocked out. In addition, the radial play of the rolling elements is minimized to an ideal level. This prevents unnecessary spotting of the cage on the running surfaces of the guide pillars or bushings.
The Agathon rolling guides thus meet the requirements that can occur on modern high-performance automatic punching presses (up to over 2,500 strokes/min) or in horizontal use in injection mold making.
Advantages:
Light metal cage
Aluminum ball cage
Thanks to its low weight and good thermal conductivity, the universally applicable cage is particularly suitable for high stroke frequencies of over 2,500 strokes/min. The low weight reduces the inertial forces that occur primarily at the reversal points of the longitudinal movement. Possible "wandering" of the ball cage is avoided. Positioning is facilitated by an assembly aid.
Design of the cage
Stroke path
Due to the preload, the balls in the cage are inevitably pulled along by force. As a result, they and therefore the cage only travel half the working stroke. This must be taken into account when designing the guide.
In order to prevent the cage from moving and thus possibly overloading the rolling elements, at least 50 % of the cage should remain in the bushing (and thus in the preload) during operation.
The cage should only be extended from the bushing if the radial force or moment load on the guide (and thus the radial load distribution of the forces on the rolling elements remaining in the preload) is low when extending/retracting into the preload. However, the prerequisite for this is that a cage retention/positioning system is used.
Preload
Definition of preload
Preload is the calculated difference between the inner diameter of the bushing (d2) minus 2x the rolling element diameter (dk), minus the pillar diameter (d1). The result expressed in μm in the minus range is referred to as preload (in relation to the diameter). The individual components must compensate for this value through deflection. The maximum material load capacity up to permanent deformation and thus failure of the component is specified by the Hertzian surface pressure (in our case 4,400 N/mm for ball guides and 4,200 N/mm for roller guides with a linear contact zone).
Technical data
d1
=
Corresponding pillar diameter
d2
=
Corresponding bushing inner diameter
l2
=
Total length of ball cage
K
=
Number of balls
C
=
Load rating in N per ball cage
Maintenance and lubrication
Maintenance
● After delivery: Remove rust inhibitor from the centering
● During maintenance: Remove old grease without residue, a washing process is recommended
Lubrication
● Apply new lubricant to the cage of the column guideway
Agathon rolling guides are practically maintenance-free, but a minimum amount of lubrication is required.
The cages are lightly oiled on delivery. They should be washed and lubricated before installation.
Basic lubrication (ball bearing grease with high pressure absorption capacity) before use or during servicing/maintenance increases the service life of the guideway.
Different products can be used depending on the application - a higher quality universal grease is often used.
Use without lubricant is not recommended (e.g. applications in clean rooms, food industry, etc.) - please contact the application technology department for any special solutions.
In the case of extremely high loads and long periods of use, lubricant can also be added periodically during use. Oil is used to flush away any particles/foreign bodies.
| Application type 1 | Lead |
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