Dimensions of Hakko FR-301 Desoldering Gun HOLDER (633-xx) - Page 1
Forum section: electronics / projects

author: t1d
author_rank: Super Contributor
timestamp: January 13, 2021, 09:29:26 pm
content: After getting skinned (pronounced "skint!" lol) on the price of an assortment of requisite gun nozzle tips, for my new gun, I decided I could just build the holder (633-xx.) I need some help with the holder's measurements, to calculate its riser’s angle and length.=============================================================================================================A = MEASUREMENT FROM TOP OF THE RISER DOWN, PERPENDICULARLY, TO THE TABLETOP. MARK THE TABLETOP LOCATION AS “A”.B = MEASUREMENT FROM BOTTOM OF THE RISER DOWN, PERPENDICULARLY, TO THE TABLETOP. MARK THE TABLETOP LOCATION AS “B”.C = MEASUREMENT FROM TABLETOP LOCATION “A” TO TABLETOP LOCATION “B”.D = BONUS, IF YOU HAVE A PROTRACTOR… ANGLE OF RISER TO TABLETOP. HOWEVER, I WILL CALCULATE ANGLE “D” FROM THE MEASUREMENTS OF A, B, AND C.========================================================================================================================I also need a 90*, side-view picture of the gun in the holder, showing how the gun nozzle is situated under the riser.I greatly appreciate your help! Please and thank you!

author: bdunham7
author_rank: Super Contributor
timestamp: January 13, 2021, 09:54:17 pm
content: C is 3 inches, B is just under 2 inches and A is about 5 inches. You'd have to be very specific about where you want to measure to if you want it more precise. b/t/w, Kimco has these for $25 and they include the brass wire holder and the wire sponge. Also, don't leave the FR-301 in the holder all of the time because it will cause the front end to flex slightly and put the metal tube out of alignment with the filter cartridge. The squares in the photo are 1 inch.

author: t1d
author_rank: Super Contributor
timestamp: January 14, 2021, 12:48:19 am
content: Quote from: bdunham7 on January 13, 2021, 09:54:17 pmGood Sir, you are absolutely awesome! Thank you. And, the grid paper background is sooo smart!So, let's do some math... A minus B eliminates the dead space under the riser that is not part of the rise calculation. See hatched out area. This moves C upward to form the base of our triangle. Given a rise of A minus B = 3 and a run of C = 3, we have a equal-sided triangle with a 90* origin. By definition, that is a right triangle... And, by definition, the angle of the riser (Hypotenuse) should be 45*.The length of the top of the riser should be the square root of the sum of A squared plus C squared. That equals the square root of 18 = 4.25" (Approx) You might measure the back of the riser and see if it is about 4.25".But, the riser does not appear to equally divide the grid paper squares on the diagonal. The angle looks to be slightly less than 45*. This may simple be a result of the camera angle. Can you eye it up and make a judgement? The weight of the gun may be flexing the riser downward, a bit, too.I look forward to your reply. I recognize your effort in helping me. Thank you, again.

author: t1d
author_rank: Super Contributor
timestamp: January 14, 2021, 01:25:34 am
content: Might you add a "T" brace, to support the gun handle, to protect the yoke seat from cracking? See photo. Drill a hole through the face of the base, insert a bolt. Add a cushion to the bolt head end and rest the handle on the cushion...FYI, if your yoke seat is already cracking, replacements are less than $2USD.https://www.tequipment.net/HakkoB2789.html?search=trueUsing a replacement yoke seat will be the secret to my design.