Automotion Aluminium profile rails and ball bearing runner blocks are designed especially for applications requiring a precise linear guide system with a huge degree of corrosion resistance. The rails consist of profiled aluminium having two pressed-in hardened stainless steel raceways for the stainless steel balls of the runner blocks to run along. Advantages are the light weight and corrosive resistant materials. Fixing holes in the attachment surfaces enable machine parts to be directly mounted onto the runner blocks. With this combination it is possible for us to offer a guide system which achieves a good price/performance ratio.
Speed - vmax = 2 m/s
Acceleration - amax = 30 m/s2
Temperature - T = 0o - 60oC
Our rails can be used in a broad range of applications. Especially in light machinery, handling technology, jigs and fixtures, assembly technology, manual displacement systems, machine enclosures, door – and window technology, display systems, aerospace, medical, food and many more.
Our aluminium rail guides cannot be used in the following applications:
1. Pre-select the carriages
2. Determine Fcomb (see below)
3. Calculate the ratio of the dynamic load capacity “C”
of the selected carriages relative to Fcomb (Fcomb divided by “C”)
If Fcomb /C > 0.4: carriages is sized too small. Select the next largest size and repeat the calculation (step 2 and 3).
The ratio must always be Fcomb / C≤ 0.4, otherwise Fmax will be exceeded.
The load ratio Fcomb / C is the quotient of the equivalent dynamic load on the bearing divided by the dynamic load capacity “C”.
Fcomb = combined equivalent load (N)
FY, FZ = Dynamic load (N)
MX = torque of the X-axis 1) (Nm)
MY = torque of the Y-axis 2) (Nm)
MZ = Moment um die Z-Achse 2) (Nm)
Mt = dynamic torsional moment load capacity (Nm) - For values, see carriage data tables
ML = dynamic longitudinal moment load capacity (Nm) - For values, see carriage data tables
C = dynamic load capacity (N) - For values, see carriage data tables
b = operating factor, (see below)
For values, see table “Recommended values for operating factors “b”.
Values for operating factors b
|1,0||Clean environment, low technical demands, manual operation|
|1,5||In a linear motion axis with ball screw drive|
|2,0||Linear motion axis with toothed belt drive|
|6,0||Linear motion axis with pneumatic drive|
|9,0||In very dirty environments|
A static load rating can not be easily determined because of the composite material (aluminium/ stainless steel combination). Instead of this you can find the values Fmax and Mmax.
Please note the parallelism required in the structure for correct installation. Parallelism of the installed rails is measured at the guide rails and the carriages. Any parallelism off set causes a slight increase in preload on one side of the assembly. As long as values specified in the table are met, the effect of parallelism off sets on the service life can generally be neglected.
|Size||Permissible deviation in parallelism PmaxStandard||Permissible deviation in parallelism PmaxPreload|
Permissible height deviation in lateral direction “hw”
Allowable height deviation in longitudinal direction “hl”
The height tolerance of several carriages on a rail is maximum ±30μ. In a combination of several carriages and rails the maximum is ±120μ.
The maximum side tolerance of several carriages on a rail is ±30 μ. In a combination of several carriages and rails, the maximum is ±70 μ.
We aim to achieve a lifetime lubrication, which we define as at least 30,000Km. The following conditions apply:
First, the ratio Fcomb / C is calculated with Fcomb according to the formula on the previous page and the dynamic load rating C from the data tables. With this value you go then in to the diagram below.
If Fcomb / C ≤ 0,15, it lies in the zone A of the diagram bellow. This means it will have lifetime lubrication.
With 0,15 < Fcomb/C ≤ 0,4 it lies in the zone B of the diagram below.
For this you must distinguish two cases:
For example Fcomb / C = 0,25 goes up to 6400km.
a) If the running distance required < 6400 km, then there is a lifetime lubrication here.
b) If the running distance required > 6400 km, then instead of the sealed unit you should use the lubrication unit option.
If value Fcomb/C > 0,4 then Fmax is exceeded.
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