Rubber Keypads
Photo Samples:
Silicone rubber keypads provide an excellent interface to your product. Delivering tactile response and environmental resistance, silicone rubber keypads should be a consideration in designing your next machine interface project.
Our engineering and design teams can deliver creative insight on emerging technology utilized in rubber keypad manufacturing. Our detail-driven Quality department has proven itself as one of our greatest assets, striving to deliver zero defect products, every time. We offer all types and configurations of silicone rubber keypads. PCBs, molded enclosures, and a wide variety of connection types available allow us to provide fast turn-a-round complete assemblies.
Manufacturing Support Services
Our aim is to cater to your specifications, providing insight into available technologies and innovative interface systems. Complete engineering consultation design services are available.
Our manufacturing facilities implement a detailed ISO process with every department involved in your project. Manufacturing of Silicone Rubber Keypads is a competitive marketplace, Miller Dial beats the odds through complete dedication to efficiency and quality. Miller Dial maintains a technical sales staff covering all of North America. Wherever your facility may reside, contact Miller Dial's superior staff to get a quote on your next Silicone Rubber Keypad project.
Manufacturing Facilities
Miller Dial's 100,000 sq ft. facility provides all of the processes required to produce top-notch production runs. Our operations team has designed our manufacturing facility to connect processes at key points for in-production inspection and efficiency optimizations.
ISO Procedures
Many years of ISO certification have contributed to our procedure enhancement programs. Our meticulous Quality team monitors our ISO procedures on a daily basis seeking procedural improvement at each point in the manufacturing process. When problems occur, the Quality team can address them immediately, with thorough root cause analysis techniques. When it comes to quality, Miller Dial can't be beat.
When choosing a manufacturer for your next machine interface, consider a leader in innovation with the years of experience that provide a mature manufacturing process.
Typical Design and Construction
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| 1. Minimum curvature 1.0 mm Ø 2. Minimum curvature 0.5 mm Ø 3. 1.5 mm 4. 1.5 mm 5. See 1 and 2 6. a+ 2.5 mm 7. 1.5 mm |
8. H<7 mm, R=0.4 9. <H<10 mm, R=0.9 10. 0.2 mm mdinimum 11. 1.5 mm 12. 1.5 mm 13. 0.3 mm 14. ³1/2 h |
15. Symmetrically placed no farther than 5 mm apart 16. Conductive Pill - 2.0 to 8.0 mm Ø x 0.60 mm thick 17. Stabilizing posts provided to minimize wobble |
General Tolerance Table
| Dimension | Tolerance |
|---|---|
| Under .400 | ±.004 |
| .400 - .790 | ±.006 |
| .791 - 1.184 | ±.008 |
| 1.185 - 1.574 | ±.010 |
| 1.575 - 1.920 | ±.012 |
| Over 1.920 | ±7% |
Tactile Characteristics of Keys
| Item | Cone | Double Cone | Bell | Double Bell | Flat |
|---|---|---|---|---|---|
| Type |  |
 |
 |
 |
 |
| Range of Pressure (Grams) | 30-250 | 50-250 | 80-200 10-200 (non-click) |
30-200 | - |
Keytop Printing Standard
| Test Applied | Result | |
|---|---|---|
| Resistance to abrasion | Rub printing with plastic eraser under 500 gm force | more than 2,700 cycles |
| Resistance to key - striking | Strike keytop with 200 gm force at 3.5 cycles/sec | more than 1,000,000 cycles |
| Resistance to peeling off | Peel off by adhesive tape | no peeling off |
| Resistance to fingerprint liquid | Apply synthetic fingerprint liquid for 240 hr at a 40° C 95% RH | no change in printing |
| Resistance to ultraviolet rays | Apply 20W sterilizing ultraviolet ray from 15 cm distance for 72 hr | no change in color |
Physical Properties & Chemical Resistance
Physical Properties
| Specific Gravity at 25° C: | 1.10 to 1.20 |
| Material Hardness: | 50 to 90 ± 5 Shore A |
| Tensile Strength: | 60 to 90 Kg/cm |
| Elongation: | 200 to 500% |
| Tear Strength: | 15 to 20 Kg/cm |
| Compression Set: | 50 to 60% |
Chemical Resistance
| Keypads can be safely exposed to the following materials: |
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Electrical Specifications
| Contact Resistance: | <200 Ohms at 120V DC, 300 mA |
| Actuation Force: | 80 to 150 grams ± 25 grams |
| Operation Life: | >1 x 106 cycles |
| Contact Bounce: | 15 ms typical |
| Contact Loading: | 12V DC/10mA max |
| Travel: | 0.8 to 1.0 mm typical |
| Operating Temperature: | -40 to 250° C |
| Storage Temperature: | -50 to 250° C |
| Volume Resistively: | 6 x 1014 ~ 1 x 1016 Ohm-cm |
| Dielectric Strength: | 24kV/mm of thickness |
| Dielectric Tangent: | 13% (50 Hz) |
| Dielectric Constant: | 2 to 3 MHz |
| Insulation Resistance: | 100 Megohms/250V DC |
| Insulation Breakdown: | 26K/mm |
Contact Pills (All Dimensions in mm) - Standard Sizes /Standard Sizes
| Standard Sizes | |||
|---|---|---|---|
| Silver | White/Carbon | Stainless-Steel | Gold |
| Round | Round | Round | Round |
| 1.5 | 2.0 | 3.0 | 3.0 |
| 2.0 | 2.5 | 3.5 | 4.0 |
| 2.5 | 3.0 | 4.0 | 5.0 |
| 3.0 | 3.5 | 5.0 | |
| 3.5 | 4.0 | 7.0 | |
| 4.0 | 4.5 | ||
| 4.5 | 5.0 | ||
| 5.0 | 6.0 | ||
| 6.0 | |||
| (Custom Size Contact Pills Available) | |||
| Contact Pills (All Dimensions in mm) - Standard Sizes | ||||
|---|---|---|---|---|
| Carbon | ||||
| Oval | Round | |||
| 1.5 x 5 | 2.5 x 6 | 4.0 x 14 | 1.5 | 5.5 |
| 2.0 x 3.5 | 2.5 x 11 | 4.0 x 15 | 2.0 | 6.0 |
| 2.0 x 4.5 | 3.0 x 5 | 4.0 x 16 | 2.5 | 6.5 |
| 2.0 x 5 | 3.0 x 8 | 4.5 x 8 | 3.0 | 7.0 |
| 2.0 x 6 | 4.0 x 6 | 5.0 x 7 | 3.5 | 7.5 |
| 2.0 x 12 | 4.0 x 7 | 5.0 x 14 | 4.0 | 8.0 |
| 2.5 x 4 | 4.0 x 8 | 6.0 x 10 | 4.5 | 8.5 |
| 2.5 x 5 | 4.0 x 11 | 5.0 | 9.0 | |
| 10.0 | ||||
Diagrams
Force vs. Resistance More force-lower resistance Less force-higher resistance |
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Contact Resistance Branch
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