New Assembly Methods Increase Reliability and Safety, Reduce Labor.

NCP Products has manufactured firearms for trap shooting since 1991. Traditionally, guns have been assembled using silver solder, requiring heat for 15-20 minutes at 1100°F. Such high heat can distort and warp a gun barrel, requiring a labor-intensive, hand-straightening process. NCP Products Owner, Dennis DeVault, wanted to create an assembly process that would maintain barrel-to-barrel integrity – where every gun he manufactured shot the same pattern. Working as a member of the NCP design team, Loctite provided the right technology and assembly methods to help them achieve their goal.

“We’ve cut down on waste. We have none, Before the change, we failed to capture between 10-15% of the sealant.” Notes Al Perry, Quality-Control Manager for A.O. Smith.”

A.O. Smith Water Products Co., of McBee, SC uses Loctite Corporation’s standard Marco II sealant dispensing equipment with a heavy-duty foot pedal to seal fittings for its line of water heaters. Operators dispensed the sealant from one-liter bottles into the Marco II system. Typically, these systems come equipped with a dispense tip on the end, allowing the operator to apply the sealant through the needle to the part. Loctite also adds a square plastic blockto improve the efficiency of the system.

Cutting the expense in half while producing a quieter-running, longer-living assembly.

On sleeve bearing pumps, normal procedure dictates that they be hardened and ground to achieve long life. Hardening tends to warp a shaft, and where long warped shafts have to be corrected by grinding, tremendous expense can be experienced. Once warpage has occurred, key fitted ends and impeller threads can never be economically corrected. One of our customers decided to put an end to this expensive operation and chose a new approach using Loctite RC 609 retaining compound.

Customer Gains with Reduced Service Calls and Field Complaints

The air compressors manufactures - Arempee Compressors were using metallic gaskets to seal the valve plate assembly to cylinder head in top block assembly of the compressors. However, the metallic gaskets do not create 100% sealing between mating surfaces and are expensive which cause field complaints of air and oil leakage. Loctite 596 silicone gasketing compounds help them to solve this problem. They covers surface imperfections and seal potential leak paths which create 100% sealing between mating flanges. The field complaints of sealing failures were eliminated - creating further savings in servicing costs for Arempee.

Figure 1: Unassembled Housing and Stator

Allows Step Motors to be Used in Sensitive Semi-Conductor Applications

In some semi-conductor applications the small amount of EMI emitted by step motors disrupted precision instruments. To eliminate the EMI, the stators needed to be grounded to the housings. After extensive testing, Lin Engineering found that Loctite® 3888™ two-part electrically conductive epoxy adhesive was selected as the optimum solution. It completely eliminated the EMI with the added benefit and also structurally reinforced the motor which has allowed Lin Engineering step motors to be used in sensitive semi-conductor applications.