The A 3X50-SL12K42 is a constant force extension spring made of 301 stainless steel, designed for applications requiring 2.09 lb of force at maximum working deflection with a minimum fatigue life of 20,000 cycles. It has a band thickness of 0.012 inch, a band width of 3/4 inch, and a free length of 2.870 inches. The spring features a drum inner diameter of 1.900 inches and is supplied with punched free ends for mounting, including a single hole with a diameter of 3/8 inch and a hole radius of 7/8 inch.
Industrial fasteners are hardware devices that join two or more items together, creating a semi-permanent or permanent connection. The fasteners most frequently used by machinery designers are screws, nuts, retaining rings, and various types of pins because of the basic role that they play in the assembly of mechanisms. Various industrial hardware components are used in the assembly process including knobs, washers, spacers, shims, handles, springs, spring-powered reels, and ball plunger screws.
Fasteners play a vital role in a wide range of applications, from everyday household items to medical devices, robotics, and even outer space. Careful consideration must be given before selecting the most appropriate fastener for an application.
Download Reference Tables to help with selection:
| Stock Drive Products & Sterling Instrument - SDP/SI | |
|---|---|
| Product Category | Constant Force Springs |
| Product Number | A 3X50-SL12K42 |
| Product Name | Constant Force Spring: 2.09 lb Spring Force, 20000 cycles Fatique Life, 42" Band length |
| Material | 301SS |
| Life Cycle | 20000 cycles |
| Load Force | 2.09 lbs (0.9478 kg) |
| Inside Diameter | 1.58 inch (40.08 mm) |
