Bellm T/C's 80 Degree Sear Polishing Stone Arkansas Translucent Hard Extra Fine

Description: Bellm T/C's 80 Degree Trigger Polishing Stone Arkansas TRANSLUCENT Hard Extra Fine Polishing For Sear Polishing Thompson Center Arms Encore ProHunter Endeavor G2, many other uses! In the Ouachita mountains stretching from East Hot Springs, Arkansas, west into Eastern Oklahoma, occurs a nearly pure silica rock formation known as Novaculite. The age of these formations is estimated to be more than 340 million years. This sedimentary rock type derived it's name from the latin work "Novacula" meaning sharp knife. Novaculite rock is the rarest and finest abrasive stone in existence. Novaculite is a compact quartzose rock of almost pure silica content. The technical advantages of the Natural Arkansas oilstone are derived from the crystalline structure of the individual quartz grains comprising more than 99 percent of Novaculite rocks. Voids and exposure of crystalline edges enhance the sharpening ability of this natural abrasive. Two basic classifications of whetstone are known as Hard Arkansas and Soft Arkansas. The Hard Arkansas is very fine grained, hard and compact, with an uneven conchodial fracture. Novaculite is typically a white stone but may be found in blue, pink, grey, black, brown or yellow tints due to the amount and nature of the minute impurities present. The Soft Arkansas resembles unglazed porcelain and has approximately the same composition as the Hard Arkansas stone. It is relatively less compact resulting in high porosity and less density. Soft Arkansas (medium) is the most popular of the four grades. It is used by wood carvers, sportsmen, butchers, commercial knife sharpeners, and others who desire a keen, polished edge on their knives and tools in a minimum time. Hard Select Arkansas (fine) is most suitable for fine polishing and the maintenance of a fine edge on knives or tools. Black and Translucent (extra fine) stones are classifications included in the True Hard Arkansas grade category according to specific gravity density standards. True Hard terminology was adopted to include all extra fine stones regardless of color. Black Arkansas stones are black or blue-black in color. Translucent stones may be a translucent shade of gray, white, yellow, brown, or sometimes pink. They are most commonly used for industrial applications where an extremely fine polish is desired. Use the 80 degree Diamond EZE Lap to first close up the sear notch to 80 degree from its original 90 degree, bringing the inside, lower corner of the notch DOWN and making this surface the hammer nose rests on at full cock a more horizontal plane. Per the current printed shop manual available here on the online store, if you place the hammer, sear, and trigger on their respective pivot pins ON THE OUTSIDE OF THE FRAME you can see how the parts all relate, and you can see that the sear notch that holds the hammer at full cock is angled down. Thus the hammer is prone to sliding down this angled surface instead of staying securely cocked. By lowering the inside corner with the 80 degree lap, you make this plane more horizontal and make the hammer less prone to sliding downward. To make sure you are doing the stoning right, take a few strokes with the lap to see that you are only cutting first in the inside corner where the hammer nose rests. Use the upper side of the sear notch rested flat on the "safe" angled surface as a guide. You can tell which side of the lap is which by the circular machine marks on the side that creates the 80 degree included angle. The 80 degree hard Arkansas stone is used in the same manner to polish the surface cut by the diamond lap while maintaining the same angle on the sear...... again, holding the upper side of the sear notch flat on the 80 degree side and using it as a guide. The Arkanas Stone brings the surface to a mirror finish. Check your work by dragging a finger nail across the sear notch where the hammer nose rests. If you can feel anything with your finger nail, you will also feel it transferred through the trigger. With the sear notch slicked up with Arkansa Stone, you may have to increase the amount of enagagement of the hammer nose in the notch to keep the hammer securely cocked. Test this by pushing forward on the hammer with your thumb. If it pushes off with moderate pressure, you definitely must increase the engagement. Do this by thinning the hammer nose top to bottom. First stone the bottom of the hammer nose flat. This brings the contact point forward, deeper into the sear notch. Then very slightly round the end of the flat you just made so there is no sharp corner to act like a phonograph needle moving across the sear notch. If the hammer will still push off, take some material off the top part of the radiused hammer nose where it contacts the upper side of the sear notch. Examine how the hammer nose fits into the notch, and you will see exactly where to remove material so the nose goes farther into the notch. The Diamond EZE Lap quickly removes material from the hard hammer nose, and it is easy to maintain flat, parallel surfaces with it.... as opposed to using power tools, which I never do in trigger work except to shorten hammer springs when needed. This is the BEST extra fine grit Hard Arkanas Stone we offer but is also my favorite. It will take a little longer than the black hard arkansas, but provide a better finish. I like to start the polishing of the sear notch with the fine and finish with this extra fine. It is quite ample for the job by itself. Many other sharpening/polishing uses. FOR A MIRROR FINISH, DO NOT OIL STONE. USE DRY. CLEAN OFTEN WITH DETERGENT AND WATER. "FRESHEN" WITH DIAMOND EZE LAP. FOR POLISHING THE SEAR SURFACE ONLY. DO NOT ATTEMPT TO ALTER THE SEAR NOTCH ANGLE WITH THIS STONE. For support, phone or email, I'm always glad to help. Mike Bellm's TCs has been serving the TC shooting community for over 30 years, you are buying from the trusted TC Encore and Contender expert. Small parts orders and other auctions can be combined shipping, your small parts and barrel orders will be packaged by a Bellm pro.

Price: 35.5 USD

Location: Olathe, Colorado

End Time: 2024-02-13T05:51:22.000Z

Shipping Cost: 0 USD