Privacy

Thank you for visiting a website of Barnes Group Inc. and those of its strategic business units, affiliates and subsidiaries (collectively, “Barnes Group”). This Privacy Policy contains information about Barnes Group’s commitment to your privacy, including:

The information we collect and how we use it;
Your rights to access or update your personally identifiable information;
Your right to opt-out of receiving communications from us; and
Our pledge to have reasonable security measures in place to protect against the loss, misuse or alteration of information under our control.

Note: This Privacy Policy applies to the web sites of Barnes Group and its affiliates and subsidiaries and not to the web sites of other companies, individuals or organizations to which we may provide links. These web sites may have different policies relating to your privacy and information they collect about you.

INFORMATION COLLECTION AND USE

Barnes Group web sites collect two kinds of information from you: personal information that you choose to supply us and non-personal information such as your IP address. To learn how to opt-out of receiving further information from Barnes Group, see the section marked “CHOICES” below.

1. Personal Information

a. E-mail. If you submit feedback, questions or requests for information about Barnes Group products and services, we may request your name, mailing address, telephone number and e-mail address in order to respond to your inquiries. Barnes Group may collect and store the information you choose to provide us to send you information about Barnes Group from time to time.

b. Surveys and Promotions. From time to time, we may request information from you via surveys or online promotions such as contests and sweepstakes. Participation is completely voluntary; you have a choice whether or not to disclose any information. Information requested may include personal contact information such as your name, shipping address, phone number or e-mail address. This information may be used to contact users with further information about Barnes Group products and services, to notify winners and award prizes, and to monitor or improve use and satisfaction of this site.

c. Financial Information E-mail Notifications. If you would like to receive company financial information alerts from Barnes Group, we ask for your e-mail address so we can send you e-mail notification.

d. Order Reports. If you would like to receive printed annual reports, proxy statements or quarterly reports by postal mail, you may ask for a copy on our web site. We ask for your contact information so we can send you such reports and statements.

2. Non-Personally Identifiable Information

a. Cookies. A cookie is a piece of data placed on your hard drive when you visit our site. Cookies help us track traffic to our site, helping us identify what parts of our site interest visitors most. We do not link cookie information with any personally identifiable information.

b. IP Addresses. An IP Address is a number used by computers on a network to identify your computer so that data can be transmitted to you. We may collect IP Address information in order to administer our web sites and to gather broad demographic information.

3. Information Sharing

Certain Barnes Group web sites may use a third party vendor for order processing. When you visit a Barnes Group online catalog to browse or to purchase Barnes Group goods online, you will leave a web site of Barnes Group and be taken to a web site operated by the third party vendor. This third party vendor will collect your personal information, including name, address and credit card information, solely for the purpose of informing Barnes Group of your order and effectuating the order fulfillment. This third party vendor will not use your information for any purpose other than to facilitate your online relationship with Barnes Group. Barnes Group may also share your personally and non-personally identifiable information with third parties that help manage our web sites and databases, and with our third-party affiliates, partners and sponsors. In addition, we may disclose information about you (i) if we are required to do so by law or legal process, (ii) to law enforcement authorities or other government officials, (iii) to protect and defend the rights or property of Barnes Group and this site; or (iv) when we believe disclosure is necessary or appropriate to prevent physical harm or financial loss or in connection with an investigation of suspected or actual illegal activity.

We reserve the right to transfer any information we have about you in the event we sell or transfer all or a portion of our business or assets. Should such a sale or transfer occur, we will use reasonable efforts to direct the transferee to use personal information you have provided through this web site in a manner that is consistent with this Privacy Policy.

CHOICES

Barnes Group provides you with the following choices regarding the use of your information:

You may set your browser to: (1) inform you when cookies are being set before a cookie is stored; (2) not accept cookies at all; and (3) erase all cookies from your hard drive. However, if you choose to reject or erase cookies, your ability to navigate this site may be limited.
You may choose to not provide us with any contact information. However, if you do so, we will be unable to process your orders, respond to your inquiries, or enter you into any promotions. Furthermore, your ability to navigate this site may be impaired.
If you would like to opt-out of receiving further information from us and would like us to remove your from our on-line mailing list, please send an e-mail to info@barnesgroupinc.com. Please include your name and e-mail address in the body of the e-mail and reference “Remove” on the subject line.
If you would like to change or modify information you have previously provided us, please send an e-mail to info@barnesgroupinc.com.
If you have any questions about this privacy policy or the practices of our web sites, please contact:

Barnes Group Inc.
Attn: Director, Investor Relations
123 Main Street
Bristol, CT 06010

NOTIFICATION OF CHANGES

This Privacy Policy may be updated periodically and without prior notice to you to reflect changes in our online information practices. We will post a prominent notice on this web site to notify you of any significant changes to our Privacy Policy and indicate at the bottom of the statement when it was most recently updated.

SPECIAL POLICY WITH REGARD TO INFORMATION FROM CHILDREN UNDER THIRTEEN

Barnes Group is not targeted to children under the age of 13, and we do not knowingly collect personally identifiable information from any child under the age of 13 without parental consent. When we do receive such information, we delete it as soon as we discover it and we do not use it or share it with third parties.

SECURITY

We make every effort to have reasonable security procedures in place to protect the loss, misuse or alteration of information under our control. Additionally, our third party vendor uses Secure Sockets Layer (SSL) technology to collect and transmit your information to use. If you have any questions about the security of our web sites, please contact info@barnesgroupinc.com

INSOLVENCY

In the unlikely event that Barnes Group ever becomes insolvent and seeks protection under bankruptcy laws, Barnes Group may share your personal information and non-personal information with a third party that intends to continue business subject to this privacy policy, as it may be amended from time to time.

Last updated 7/29/2008

Geometry of The Clover®Dome +/-: Figure 1 illustrates the basic geometry of the spring, essentially a continuous clover-shaped ribbon of equal width (W) and formed into three equally spaced disc segments (S) which can deflect radially when side-stressed (F) at the aperture or vertically, when formed into a dome. Characteristic of Clover®Dome geometry is the relationship of radial point P1 at the inner edge of the disc’s outer segments (S) to radial point P2 at the inner edge of cutouts (A). For standard dome, P2 is located on or inside the diameter determined by the radius at point P1.
Clover®Dome Spring Rates +/-: The unique spring rate of the Clover®Dome bridges the large gap between very stiff Belleville disc springs and resilient coil springs. To demonstrate the different spring rates between Clover®Dome, Belleville, Curved, Wave and Finger springs, a simple equation referred to as “Coefficient of Compliance” (CC) is shown in Table 1. The Coefficient of Compliance (CC) can be determined by experimental means or if the material thickness has been determined.

The equation below shows how to calculate the CC when the material thickness has previously been determined. Generally the CC is approximated using data derived experimentally. The CC is a relative method for comparing springs. The common disc spring is stiffer and would have a very low CC while highly compliant coil springs will have a higher CC. The coefficient is calculated as follows:
Deflection +/-: The angle of the conical form will determine the amount of total deflection the Clover®Dome will yield. This cone angle is dependent upon the ratio of the OD to the ID and the thickness of the material. Testing has shown that as material thick-ness increases the cone angle decreases. OD to ID ratios of 2.0 will also yield a lower cone angle when compared to OD to ID ratios of 2.5 and higher. The actual cone angle is difficult to predict and these calculations should only be used as ap-proximations. The following figure is a guide to approximating the height of the formed part. OD to ID ratios approximately 2.0 with material thickness greater than .030” should use an angle of approximately 13º. While OD to ID ratios of 2.5 and greater with material thickness less than .030” should use angles of approximately 14º.
Spring Rate +/-: The desired spring rate is used for calculating the material thickness. To determine the spring rate we must know what the desired loads are for the Clover®Dome as well as the OD and ID. First we must determine the amount of deflection a particular OD and ID combination will generate. This can be determined from the previous section on calculating deflection. Once the deflection is calculated we can then determine the spring rate by dividing the desired load by the calculated deflection. This will approximate the spring rate as if it were linear. We know from figure 3 that the spring characteristics are very often non-linear. This approximation is necessary to calculate the properties of the Clover®Dome. This spring rate is theoretical and should only be used to approximate designs.
Force Vs. Deflection Curves +/-: The shape of the force versus deflection curves (FD curves) can be approximated using figure 3 below. The ratio h to t is used to determine the shape of the particular curve. Ratios of 3.5 and higher yield a regressive curve while ratios of .5 yield a progressive curve.
Series Stacking +/-: Series stacking of Clover®Domes is utilized when the deflection of a single spring is not sufficient. Equation 3 illustrates the effects of placing Clover®Domes in series stacks. The force for the stack remains constant while the number of parts in the stack multiplies the deflection.
Parallel Stacking +/-: Parallel stacks of Clover®Domes can be used to achieve forces that can not be reached using single springs. Equation 4 illustrates the effects of adding springs in parallel. The force of each spring added to the stack is added to the total load while the total deflection of the stack remains constant.
Material Thickness +/-: The thickness of Clover®Domes is calculated using the spring rate, approximated CC and the OD. The following equation shows how to determine the material thickness required.

There are limitations to material thickness. Pre-tempered material, that is required for the Clover®Dome, is available in thickness’ up to .060” (1.52mm). Generating parts thicker than this is generally avoided. At this time designing parts over .050” (1.27 mm) should be avoided due to manufacturing limitations and material availability. Figure 6 (below) is an example of the variation in FD curves for parts with the same OD/ID and varying thicknesses.
Deduction +/-: The trend of force / deflection curve for a thick “t” disc tends to be linear. For a thin “t” disc the curve is linear for the first portion of the curve but tends to flatten out and regress at its apex.
Friction & Hysteresis +/-: Fiction is generated when Clover®Domes are in contact with any other surface. The friction is roughly equivalent to 3% of the total load. When stacking Clover®Domes friction of each part stacked in parallel is taken into account. The friction generated by series stacks is much lower than parallel stacks. Hysteresis is the difference in force from loading to unloading. Hysteresis results in an increase in force during loading and loss of force during unloading. Figure 7 illustrates hysteresis, which can be equivalent to 3% of the maximum force. The effects can be reduced using lubrication on the friction surfaces.
Specifications +/-: In considering a Clover®Dome disc spring application it is important to ask the following questions:

* Size limitations on OD & ID
* Space limitations, max height (O.H.)
* Pre-load (load at initial deflection)
* Final load (load at full deflection)
* Initial deflection (measured from O.H. )
* Distance from initial to final deflection
* Static or dynamic application
* No. of cycles if dynamic
* Environment (Chemical, temperature)