Tension-Pins-DIN1481-DIN-7346-JIS-B2808-ISO8752-ISO13337-ANSI-Asme-B-18-8-2

Specifications

Product feature

More information about tension pin

A spring pin (also called tension pin or roll pin) is a mechanical fastener that secures the position of two or more parts of a machine relative to each other. Spring pins have a body diameter which is larger than the hole diameter, and a chamfer on either one or both ends to facilitate starting the pin into the hole. The spring action of the pin allows it to compress as it assumes the diameter of the hole. The radial force exerted by the pin against the hole wall retains it in the hole, therefore a spring pin is considered a self retaining fastener.

There are two types of spring pins: slotted spring pins and coiled spring pins.

Coiled spring pins

A coiled spring pin, also known as a spiral pin, is a self retaining engineered fastener manufactured by roll forming metal strip into a spiral cross section of 2 1/4 coils. Coiled spring pins have a body diameter larger than the recommended hole diameter and chamfers on both ends to facilitate starting the pin into the hole, the spring action of the pin allows it to compress as it assumes the diameter of the hole.

When coiled spring pins are installed, the compression starts at the outer edge and moves through the coils toward the center. Coiled pins continue to flex after insertion when a load is applied to the pin thus providing excellent performance to counter fatigue in dynamic applications. Coiled spring pins were invented by Herman Koehl circa 1948.

Coiled pins are commercially available in three different duties, standard (ISO 8750), heavy (ISO 8748) and light duty (ISO 8751), which provide for a variety of combinations of strength, flexibility and diameter to suit different mating host materials and performance requirements. Typical materials for coiled spring pins include high carbon steel, stainless steel and alloy 6150.

Coiled pins are used extensively in cosmetic cases, automotive door handles and locks, and latches as hinge pins. They’re also used as pivots and axles, for alignment and stopping, to fasten multiple components together—such as a gear and shaft—and even as ejector pins to remove motherboards from PCs. The automotive and electrical industries use coiled pins in such products as steering boxes and columns, pumps, electric motors and circuit breakers.

International Standards

• Standard Duty: UNE–EN-ISO 8750, NASM10971, NASM51923, NAS1407, ASME B18.8.2, ASME B18.8.3M
• Heavy Duty: UNE–EN-ISO 8748, NASM10971, NASM39086, NAS561, ASME B18.8.2, ASME B18.8.3M
• Light Duty: UNE–EN-ISO 8751, NASM10971, NASM51987, NAS1407, ASME B18.8.2, ASME B18.8.3M

• Standard duty coiled spring pins offer the best balance between flexibility and strength and are recommended for most applications.
• Heavy duty coiled spring pins are typically used in high shear strength applications and hardened host materials.
• Light duty pins are used in applications with soft metals and plastics holes where there is a high risk of enlarging or breaking the host using a traditional press fit solid pin.

How to place an order:

1.What you need to do is send us your design drawing, samples or design concept draft, after that we will assess your products and budget unit price for you.(see bottom charts )

2. We’ll communicate with you again about if there is a need for sample making after your approval.

3. Production time of samples: 3 days for simple samples and 7 to 10 days for complicated samples which need mold open.

4. For customers of first cooperation, we can make a proof for free to show our capacity and high efficiency service to you. As for particularly complicated samples, we will communicate with you separately.

5. Mass production delivery: usually delivery time is 10-15 days, but we can try 7-10 days if it is a rush order. It depends on production plan if it’s a sizable order.

6. Packaging: as to complicated products, we can special design based on your packing requirement.

7.Our freight advantage:

  a) If you are worrying about freight trouble because of your small quantity goods, it will be the best choice to use express. We will offer you the cheaper express price than the official UPS or DHL; for example, 100kg goods only need 6usd/kg and 50kg goods only 7usd/kg. If you just place an order for 1000pcs, you only need to pay very little express charges and gain the fastest delivery.

  b) If you place a large order, we will help you ship goods by sea, and we are very experienced to handle with it, we can organize all kinds of goods a whole container and recommend best vessels agent for you.

About us:

Dongguan City Yisen Precision Spring Co., Ltd. (Since 1998) is a high technology hardware company with more than 200 workers, and has been specializing in designing and manufacturing springs, hardware and spring making machines. We've gained worldwide customers' trust with our high design level, top class quality, high grade services and competitive prices, which make us become the supplier for many famous companies in many business lines in the world. Our company has been certified by GB/T19002-1994 and ISO9002:1994 management system in order to upgrade the whole quality management and provide you with the best quality products and the most valuable services!

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