The bottom line is that the presence of the letter “N” in an insert code indicates unequivocally that the insert is made of carbide. In the same vein, an insert with the coding VNMG160804 reveals that the second letter is a “N.” You can tell that it is a negative angle insert since the explanation chart has the letter “N” next to the clearance angle of 0 degrees. In this instance, the angle is more than 0 degrees, which is why we refer to it as a positive angle insert. ![]() The second letter “C” in this letter sequence indicates that the clearance angle is 7 degrees. On the description chart is an insert with the number CCMT120206. It should come as no surprise that the first letter in the codes for the inserts indicates the form of the insert, whilst the second letter in the code specifies the clearance angle. On the other hand, the positive angle inserts will always have a clearance angle that falls somewhere between 0 and 90 degrees. To begin, inserts with negative angles often have clearance angles of zero degrees. The clearance angle is where the primary difference between inserts with a positive angle and inserts with a negative angle may be found. The rake angle has an indirect impact on machinability as well. This value has the potential to affect the cutting force and power consumption during machining, as well as the life of the cutting tool, chip deviation, shear angle, tool life, and other factors. Each of these three varieties comes with its own unique set of benefits and drawbacks. At the same time, the rake angle might have a positive value, a negative value, or perhaps no value at all depending on the angle at which the rake surface is inclined with respect to the reference plane. It is possible for it to be referred to by a variety of names, some of which depend on the plane on which it is projected and measured. The rake angle of the cutting tool is defined as the angle of orientation of the tool’s rake surface from the reference plane (R), and it is measured on some other plane. Positive angle inserts have a positive angle, and negative angle inserts have a negative angle. Consult test manufacturers’ instructions when using this product changes in reagents, sample requirement, or methodology may effect test results.Both positive and negative angle inserts relate to the angle of the cutting edge in relation to the machined surface. This control is meant to be used to validate the performance of qualitative urine hCG methods that screen urine for hCG levels consistent with pregnancy. Add an appropriate aliquot of Pregnancy-Skreen™ control urine as required by the hCG immunochromatographic device or screening method. Allow controls to come to room temperature followed by gentle swirling or inversion before use. Subsequent testing of the control material is performed qualitatively to ascertain that positive controls tested positive and the negative controls tested negative for the claimed life of the product.ġ. The initial assay of the lyophilized material used for spiking was performed by radioimmunoassay. The standard material used for spiking was obtained from human pregnancy urine lyophilized and found negative by ELISA to HIV-1, antibody for HCV and for HBSAG. The negative control is prepared from a urine pool that tested negative for hCG. The positive control is spiked with hCG in a target range from 200-400 mIU/mL of urine matrix. The PREGNANCY-SKREENTM hCG product line of controls is manufactured using a human based urine matrix that has been stabilized to insure that the product will be viable until the date of expiration. Negative control urine is certified negative for the constituents listed in this insert. Positive control urines have been spiked with known quantities of purified hCG. Includes: 1 Positive, 4mL dropper bottle, 1 Negative, 4mL dropper bottleĮach vial contains stabilized human based urine in a convenient liquid form. ![]() These hCG controls can be used to monitor the performance of qualitative immunochromatographic hCG detection devices. The PREGNANCY-SKREEN™ Human Chorionic Gonadotropin (hCG) Positive and Negative controls are prepared from human based urine.
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