Re: ShopTalk: Hosel Heater

[Bernie Baymiller]

jb,   I use a heating pad that is designed to wrap around a thigh or arm...measures 6" wide x 20" long. Using GS 24-hour shafting epoxy, I put one or two heads on it, wrap over the top of heads, set temp control on high and epoxy is solid for clean-up in 90 minutes or slightly less. I've hit these clubs in four hours with no problems.     Another even simpler solution is to heat with halogen work lights. Here's a past post from ST'er Chris Burns:   "I use two halogen lights.  The small 100W model is used for 1-2 clubs and can be placed about 3-4 inches from the clubs. The larger 500W light really speeds things up.  It needs to be placed about 12" from the clubs and works well when curing a whole set of clubs.  I use the GS 24 hr. epoxy and have played with clubs within 3 hours using this method.  My intent, though, is just to speed the curing so that I can finish ferrules and grip the clubs about 2 hours after initial mixing."   Also, FYI, here's some comments from Mark Ehly at GS, which I saved from a 1999 post on temperature, time and strength: "...most room-temperature, cured epoxy systems give better bond strength at moderate heat cure as compared to room-temperature cure. This is because of the better "wetting" of the substrate because the surface energy of the mixed epoxy is lower and the viscosity is lower." Our standard 24 hour shafting epoxy cures to a shear strength of 3500 PSI at 18 hours at 25 C. When the temperature is increased to 82C (180f) for one hour, the strength is 3650 psi. At 66C (150f) for two hours the strength is increased to 3800psi. " "As a table (DMT added): Temp*C Temp*F Cure Time Shear Strength 25 77 18 hr 3500 psi 66 150 2 hr 3800 psi 82 180 1 hr 3650 psi Looks like 150° for best strength and cure time in two hours...at least, with GS 24 hour epoxy. My heating pad doesn't get to 150°, so isn't quite that fast...but close enough.   Bernie Writeto: [EMAIL PROTECTED]       ----- Original Message ----- From: jb To: [EMAIL PROTECTED] Sent: Thursday, April 03, 2003 3:49 PM Subject: RE: ShopTalk: Hosel Heater Cure epoxy. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of [EMAIL PROTECTED] Sent: Thursday, April 03, 2003 3:36 PM To: [EMAIL PROTECTED] Subject: Re: ShopTalk: Hosel Heater In a message dated 4/3/03 12:07:55 PM Eastern Standard Time, [EMAIL PROTECTED] writes: Anybody know of a supplier for a single-club wrap-around hosel heater? What do you want this heater to do. Cure epoxy. Heat to remove head?  Or just keep your hosels warm?