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HepcoMotion Ring Discs are ideally suited for turntable applications where a precision platform is required for the mounting of components. Ring discs are made from high quality steel, hardened on the V edge and precision ground all over*1. An external datum register is provided and a gear drive option is available in which the number of teeth is divisible by 4 and 12 in order to provide maximum choice of pinion size for exact ratio requirements.
All key dimensions are the same as for the corresponding size of Double Edge Ring Slide
For applications where weight is an issue, a lightweight version (option 'L') is available. Stainless steel ring discs are also available, as is the tapped hole option 'N'.
Ring discs can be made to customer's specification, on request. Variations include other diameters, different thicknesses, special holes, registers or other mounting features, and alternative patterns of lightening recess.
Ring Disc
Unit of Measure
Items Ring Disc
RD25 159
Ring Disc 		Ring Disc
RD25 255
Ring Disc 		Ring Disc
RD25 351
Ring Disc 		Ring Disc
RD44 468
Ring Disc
Description N/A HepcoMotion Ring Discs are ideally suited for turntable applications where a precision platform is required for the mounting of components. Ring discs are made from high quality steel, hardened on the V edge and precision ground all over*1. An external datum register is provided and a gear drive option is available in which the number of teeth is divisible by 4 and 12 in order to provide maximum choice of pinion size for exact ratio requirements.
All key dimensions are the same as for the corresponding size of Double Edge Ring Slide
For applications where weight is an issue, a lightweight version (option 'L') is available. Stainless steel ring discs are also available, as is the tapped hole option 'N'.
Ring discs can be made to customer's specification, on request. Variations include other diameters, different thicknesses, special holes, registers or other mounting features, and alternative patterns of lightening recess.
For use with bearing Ø N/A J25 N/A J25 N/A J25 N/A J34
Dimension A (± 0.2) N/A 159 mm N/A 255 mm N/A 351 mm N/A 468 mm
Dimension B N/A 184 mm N/A 280 mm N/A 376 mm N/A 512 mm
Dimension C Ø N/A 174.4 mm N/A 270.4 mm N/A 366.4 mm N/A 494 mm
Dimension C Tolerance (±) N/A 0.039 mm N/A 0.041 mm N/A 0.044 mm N/A 0.046 mm
Dimension D N/A 184.74 mm N/A 280.74 mm N/A 376.74 mm N/A 512.74 mm
Dimension F N/A 5 mm
Dimension G N/A 15.4 mm N/A 15.4 mm N/A 15.4 mm N/A 26 mm
Dimension H N/A 12.25 mm N/A 12.25 mm N/A 12.25 mm N/A 15.5 mm
Dimension I (± 0.025) N/A 10 mm N/A 10 mm N/A 10 mm N/A 12.5 mm
Dimension J N/A 4.5 mm N/A 4.5 mm N/A 4.5 mm N/A 6 mm
Dimension K N/A 5.75 mm N/A 5.75 mm N/A 5.75 mm N/A 7 mm
Dimension L N/A 9 x 6 mm
Dimension M N/A 5.5 mm N/A 5.5 mm N/A 5.5 mm N/A 6.8 mm
Dimension M (Min) N/A 159 mm N/A 255 mm N/A 351 mm N/A 468 mm
DIN912 (Not supplied) N/A M5 N/A M5 N/A M5 N/A M6
Dimension N N/A M8
Dimension O N/A 0.5 mm
External Gear Dimension P N/A 172.8 mm N/A 268.8 mm N/A 364.8 mm N/A 492 mm
External Gear MOD N/A 0.8 mm N/A 0.8 mm N/A 0.8 mm N/A 1 mm
External Gear No of teeth N/A 216 N/A 336 N/A 456 N/A 492
Number of Holes N/A 8 N/A 8 N/A 12 N/A 12
Dimension S (Holes within ± 0.2 of true position) N/A 45 º N/A 45 º N/A 30 º N/A 30 º
Standard Weight N/A 2.3 kg N/A 5.5 kg N/A 10.2 kg N/A 23.6 kg
Light Weight N/A 1.4 kg N/A 3.0 kg N/A 5.2 kg N/A 12.2 kg
Manufacturing Notes N/A The internal faces of the lightening recess in the lightweight version are not ground. On stainless steel ring discs, these surfaces are polished