Tag Archives: four options for repairing damaged stems

A First Horn Stem on a Throw Away Pipe


Blog by Dal Stanton

On a recent pipe foraging expedition at the Antique Market near Nevski Cathedral in the heart of downtown Sofia, Bulgaria, I saw this pipe on one of the tables I was methodically scanning.  It was a sad scene but a survivor.  It was a petite (5.25”) hexagonal paneled shape pipe with a diamond shank banded and it was beat up.  What got my attention through the sorry state of affairs was the stem.  The vendor made sure I knew that the stem was bone – at least that’s what I thought he said as he hyped the great deal before me in Bulgarian.  I have yet to collect a ‘bone’ stem pipe, if that is indeed what it is, of any variety so I decided to start the bargaining dance.  He also said it was from Greece, which I could not determine by looking at the faint markings stamped in the right side of the shank, Extra over Bruyere.  Five euros was the opening volley – about 10BGN or $5.70 – not high stakes.  After getting permission from the vendor to take the stem off to get a better look I tried a few gentle twists and it wouldn’t budge.  Without pause, I handed it back to the vendor not wanting to break it and sealing the deal by default, “You broke it, you own it.”  After twisting and pulling and pouring water on it, he also could not remove the stem –  which was to my favor.  We struck a deal at 7 BGN ($4) and I gave him a 10 Leva bill.  Without proper change he asked nearby vendors for help and received none.  I dug further in my pockets and produced two 2BGN bills – 4 Leva total small stuff.  I held the 10 and the pair of 2s in each hand and shrugging my shoulders and he took the pair of 2s and the deal was sealed – about $2.30 for the ‘bone’ stem pipe.  I thanked him for the discount, but made a mental note to pay the vendor the additional 3BGN on a future visit – a good vendor friend can be achieved!  At home I took pictures of my $2.30 acquisition and promptly dropped the pipe into an alcohol bath to decontaminate it and hopefully loosen the stem.  I wasn’t sure if the stem was simply inserted with a straight tenon or if the stem screwed into the mortise.  Hopefully, this would all become clear after the bath got a chance to soften the cemented crud – which was in great supply.  The pictures I took when I was home tell the story.Horn1 Horn2 Horn3 Horn4 Horn5 HORN6 Horn7 Horn8 Horn9The alcohol bath did the trick and I was able to remove the stem and get a look at the internals.  Looking down the mortise, there was a solid wall of hardened tar muck that closed access to the bowl.  The airway of the stem was also blocked by crud.  The rim still showed lava flow and tar caked on the top, but I could see the rim and the damage done to it as well as to the bowl.  I decide to have a second alcohol bath to loosen things up further and to clean up the rim to better assess how to proceed.

With question in my mind about the true nature of the stem, I sent some pictures of the stem to Steve with the question, “Horn or Bone?”  His guess was that it is horn because of the tooth chatter on it.  He also referenced his recent post, A Ropp La Montagnarde Deposee 298 Horn-Cherrywood-Briar and a helpful essay (My Process for Repairing and Polishing Horn Stems) to give me input on working with horn stems.  He did say that he had never seen a horn stem spliced like this one.  I’ve included that picture (4th) he referenced below – interesting factoid.  While the pipe got its second alcohol bath I read the essay on repairing and polishing horn stems.Horn10 Horn11 Horn12 Horn13Well, that was gross.  The second bath finished, I take the stem and start to push bristled pipe cleaners dipped in isopropyl 95% through the airway from the tenon toward the button.  As I push, from the button air hole oozed what looked like a seal brown loaf of lava gunk toothpaste – nasty, nasty stuff.  But I guess, the ooze of magna putridum was good news as the airway was in the process of being reconquered.  After many pipe cleaners, bristled and smooth, the stem starts coming clean.  I put the stem aside and I grab the stummel from the bath and work on the mortise attacking the tar gunk blockage.  After many Q-tips and pipe cleaners dipped in alcohol, it too is reclaimed.  I’m thankful that Q-tips are plentiful in Bulgaria.  Taking a brass bristle brush which will not scratch the wood surface further, I work on the rim to remove the lava and thick oil/gunk buildup.  I finish by working the stummel surface with a toothbrush and cotton pads.  The pictures show the progress (I’m on the 10th floor balcony and notice that the sun goes down on my labors!) and I take a close up of the rim to assess how to tackle it.Horn14 Horn15 Horn16 Horn17 Horn18

Before working on the rim, I need to ream the bowl to bring it down to the briar.  The cake is very light.  After I get my Pipnet reaming kit out and ready the smallest blade, I realize that the bowl is too small and the blade would only impact the very top area of the chamber.  Then I think of the Savinelli Pipe Knife that I snagged on eBay a week ago that my son-in-law will be bringing to Bulgaria in a few weeks when he and our daughter visit from Denver!  My Winchester pocket knife will have to do the job.  To avoid cutting into the chamber wall I reverse the blade angle to scrape it over the wall.  It works pretty well as I work the blade down into the bowl which is more conical coming to a point at the bottom than oval shaped.  I follow the Winchester by sanding the chamber wall with 120 grit sanding paper rolled up then finishing with 240 grit.  I want the bowl to be as clean and smooth as I can get it.Horn19 Horn20 Horn21Returning to the work table the next day after work, I’ve had some time to think about the rim repair.  I take another close up shot after finishing the reaming and sanding the bowl to see where I am.  The stummel reminds me a bit of a bulldog shape with the cap of the bowl rising from the panels.  The challenge is that the rim is pretty chewed up and there isn’t a whole lot of wood to work with on the cap!  I decide to establish a thin rim by topping the bowl, just enough to establish a ring, then fudge on the inside by cutting a bevel to remove the damage and on the outside sand to round up to the rim’s ring hopefully removing the damage and leaving a balanced stummel.  This is the plan. I use 240 grit sanding paper on a chop block as a topping table.  I rotate the stummel on the table very conservatively, checking the progress after every few rotations.  I’m careful to keep the rim level!  The pictures show the progress.  The last picture below shows the result.  I do not want to take more briar off at this point.  A rim is established but with significant incursions on the inside of the rim at 2, 7 and 11 o’clock with smaller cuts at 8 and 10.  An inside bevel should take care of the 8 and 10 o’clock damage but will not fully eradicate the larger injuries to this rim. Horn22 Horn23 Horn24 Horn25In order to fill in the deep crevices I decide to mix a thick putty of briar dust and super glue. I prepare the rim by first cleaning it thoroughly with alcohol and a cotton pad getting rid of residue left over from the topping and using the dental pick to clean out any loose stuff stuck in crevices.  I want a good bond to form to fill crevices but also to form an even resistance on the inner rim when I cut the bevel later.  I use toothpicks to apply the briar dust putty to the cuts and bruises.  I decide to apply it to the small wounds too and then put the stummel aside to allow the putty to cure overnight.  I hope this approach works!Horn26 Horn27 Horn28With the super glue on the work table, I take the horn stem and look at it more closely.  I read the essay Steve wrote especially for working with horn stems and understand that the approach is not as aggressive as working with vulcanite or Lucite stems.  The goal is to repair surface areas that are broken and can splinter and become porous and treat the entire stem surface with polish and waxes to harden and smooth the surface.  There is tooth chatter above and below the bit, with some opening of the horn surface.  I also identify minuscule holes on the edge of the bit.  There was also a crack that ran between the two ‘bonded’ parts of the stem.  I have no idea whether cracks in horn stems will ‘creep’ but following the general principle of closing up the surface area, I decide to apply some super glue to the crack at least to seal it.  I start with 240 grit sanding paper by mildly sanding above and below the bit addressing the chatter and open, porous area.  I sand lightly not trying to totally remove the open areas but preparing it for a super glue patch to fill it in and close it.  After sanding, I apply super glue to the bit area making sure to fill the porous, softer surface.  Super glue was also applied to the small holes on the edge of the stem as well as to the crack.  The pictures show the progress.HORN29 Horn30 Horn31 Horn32 Horn33 Horn34With the super glue cured after sitting overnight, I use 240 grit sanding paper to bring the bump of the super glue patch down to the stem surface level. I gingerly use the flat square corner of the needle file to cut into the super glue to redefine the button lip.  My goal is to blend the patch with the horn stem so I feather the sanding outward toward the stem.  You can still see the darker patch but it should blend more as I polish the horn stem.  While I smooth out the super glue patch to fill in the crack on the splice line I also detect a small ridge along one side of the stem where the bonding between the two horn pieces come together.  I sand that down with 240 grit paper as well.  My goal is a smooth hardened horn surface.  Pictures show patches on the top and bottom.Horn35 Horn36With Steve’s essay on horn stem repair informing my steps, I use medium and fine grit sanding sponges on the entire stem.  I want to feather the patches with the rest of the stem surface with the goal that transitions from super glue patches to the horn surface are not detected either by touch or with the tongue on the button area. I’m pleased with the blending I see as the marks from the 240 grit paper disappear – even the crack (first picture center bottom) at the horn splice point is less visible.Horn37 Horn38Now I polishing the horn stem with the normal cycles of micromesh sanding pads. I wet sand using 1500 to 2400 pads and follow with a hearty application of Obsidian Oil.  The horn absorbs the oil readily.  After the first micromesh cycle, I noticed that what I had been calling a ‘crack’ at the splice joint had almost disappeared.  Perhaps the wound was not a crack but a sharp cut into the horn.  Either way, the polishing process was going well.  I also polish the metal tennon with the 1500-2400 pads to clean and shine it.  Next I dry sand using 3200 to 4000 and again apply Obsidian Oil.  Again, using 6000 to 24000 micromesh pads I dry sand and then apply a final coating of Obsidian Oil and put the stem aside to dry.  The blending looks good – even though the patch areas are visible, with the blending and polishing the patches now have more of a natural horn look.  The pictures show the micromesh progress.Horn39 Horn40 Horn41The stummel has had ample time for the briar dust super glue putty patches to the rim to cure.  I take a close up of the cured rim patches to mark the progress and then use 240 grit sanding paper to strategically take the briar dust patches down to the rim surface level.  I want to remove the mounds before returning the stummel to the topping table outside on the balcony for a few more rotations on 240 grit paper just to make sure the plateau is flat.Horn42 Horn43 Horn44Now I cut a bevel inside the rim to address the rim damage and to finish smoothing out the briar dust super glue patches.  I use a tightly rolled piece of 120 grit sanding paper to establish the bevel by gradually rotating the bowl in my hand while sanding to achieve a gradual uniform bevel.  Then, with the bevel cut, I use 240 grit paper, again tightly rolled to present a harder surface to the wood, to finish it.  The rim repair looks good.  The three main patched areas are barely visible and blending well.Horn45Now to the external surface of the stummel.  I remove the metal band and apply Murphy’s Wood Soap with a cotton pad to see to remove any leftover tars and oils on the surface.  The cap of the bowl shows the most damage.  At the top of the picture above you can see pitting in the briar.  I use medium and fine grade sanding sponges to work the pitting out of the cap around the circumference of the rim.  Satisfied, I decide not to stain but to restore the original stained surface – I like the color and the grain is promising.  I begin working on the stummel with micromesh sanding pads beginning by wet sanding using 1500 to 2400. Following this, dry sanding 3200 to 6000, then 6000 to 12000.  This little pipe is starting to pop.Horn46 Horn47 Horn48 Horn49 Horn50After remounting the metal band and attaching the horn stem, I complete the polishing with the Dremel wheels by applying Blue Diamond to stem and stummel with a felt Dremel buffing wheel.  I’m careful to work the horn stem lightly so I don’t overheat the surface and cause splintering or an opening of the surface.  Following the Blue Diamond, stem and stubble receive several coats of carnauba wax with a cotton cloth wheel.  Finally, I give a Dremel wheel buff with a clean cotton cloth wheel.  To raise the shine of the horn and briar, I give the pipe a vigorous buffing with a microfiber cloth.

I’m very surprised how well this little pipe cleaned and polished up.  The rim repair was daunting but amazingly the briar dust patches are practically invisible and blend well with the natural grain movement.  My first horn stem repair looks good from where I sit.  I’m not sure who smokes a pipe this small but someone did before I received it and I’m happy to return it to service.  I couldn’t resist a ‘before and after’ shot to start things.  Thanks for joining me!Horn51 Horn52 Horn53 Horn54 Horn55 Horn56 Horn57 Horn58 Horn59

 

What are the options for repairing a damaged stem?


Blog by Steve Laug

Over the years that I have been working on pipe restoration I have found that when working on badly damaged stems I have 4 basic choices on how to deal with the damage. They are stated in the form of a simple list below but each one will have to be detailed out to understand the implications of the choice.
1. Cut it off
2. Build it up
3. Splice it
4. Replace it

Choice #1 – Cut it off

This sounds pretty brutal but it really is a pretty easy repair to work on the chewed stem. I generally see how far back I have to go to get enough stem material on the top and bottom of the stem to shape a new button. Once I have a pretty clear idea of that I put a piece of cellophane tape on the stem to get an idea of how it will look with that bit of stem removed. Sometimes the new stem length just does not work. If it is too short it is awkward. If not then it can be reworked and still look acceptable. I have even cut back badly broken billiard stems and crafted a Lovat shaped pipe that looked really good. The decision is yours and cannot be reversed without making a new stem for the pipe.

The process is quite simple. Once I have marked the part of the stem I plan to remove I use a Dremel with a sanding drum to remove the damaged portion. It works quite quickly. The only caution is to keep the line straight as you are removing the broken part of the stem. This line is not only the horizontal one across the surface of the stem but also the vertical one looking at the pipe from the end. Others use a coping saw or hacksaw to remove the broken area. I prefer a Dremel. With the end removed the stem is ready for reshaping. I use needle files to cut a new button on the stem. I do that by filing a straight line across the top and bottom of the stem making sure that they align.Broken1

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Broken3 Once the new button line is in place I use a flat needle file to file back the slope of the stem to the button line. I am careful not to go to deep but judge depth by the amount of material above the opening in the stem end. Once I have the slope set and the button more defined I use the flat needle file to clean up and define the edge of the button. I want a good sharp edge on the inside of the button to catch behind the teeth. I use 220 grit sandpaper to clean up the slope and smooth out the file marks.Broken4

Broken5 When I get the stem shaped the way I want it I then move on to the shaping of the button. I like a button that is shaped like an oval that tapers outward to the edges on both sides. I sand and file and file and sand to shape it. When I have the shape correct I also slope the button backward toward the airway on the stem end. I generally am working the button to look as much as possible like the one that was originally on the stem. I use pictures of the stem from the internet or from the camera that I took to get the look just right.Broken6 After the button is shaped I work on the airway in the end of the button. I want it to be a slot. I use the needle files to open the airway. I flair it from the opening like a Y. The idea is to create an opening that is funnel shaped. I start with a flat file and work toward a round and an oval needle file I shape the ends of the slot to match the shape of the button as much as possible. When I finally have the slot open I fold a piece of sandpaper and work on the inside of the slot to smooth out the file marks.Broken7

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Broken9 I finish by sanding the stem with micromesh sanding pads and polishing it to give it a shine. Here are some photos of the finished stem.Broken10

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Choice #2 – Build it up

I have used this method quite a bit with variations. I have used it repair bite marks and bite throughs on stem. The basic procedure is to clean up the affected area on the stem with alcohol and sandpaper to prepare it for the buildup. I leave the area slightly roughened to give the repair something to grab on to. Once all loose debris, sanding dust and oxidation is removed you are ready to begin the patch. The stem I am using to illustrate the process had holes on both sides of the stem and both were large. Alongside both sides there were also many tooth dents that needed to be addressed as well. In this case those dents would provide a strong base for what would be a large patch.Broken12

Broken13 I grease a piece of folded paper or a nail file with Vaseline and insert it into the slot on the stem. I want to have a slick base for the glue to sit against but not fasten to. I also do not want to close off the airway and this method has worked well for me for many years.Broken14

Broken15 With the folded paper inserted it is time to begin to build up the repair. I use medium viscosity black super glue that I get from Stewart MacDonald online. I build up the edges of the repair first. Some folks will use an accelerator at this point to speed up the process. I have also done so but find that the glue is more brittle and I have had patches fail after using it. So I have learned to “patiently” wait for the glue to harden. Others mix in fine charcoal powder or grit with the superglue and feel that it gives a stronger patch. I have done that as well but did not choose to use that on this stem repair.Broken16

Broken17 As the first layer of glue dried I continued to build the patch inward to the middle and thicken it as well. The process took several days and included at least four layers of glue.Broken18

Broken19 Once the last layer of the patch was finished I set the pipe aside to cure for several days. When it was dry I sanded it with 180 grit sandpaper and then 220 grit sandpaper to level out the patch and the surrounding stem.Broken20

Broken21 I used needle files to sharpen and define the edge of the button. I sanded it with a medium and a fine grit sanding sponge. The patches show up still in the surface of the stem as a slightly different colour but once the stem is sanded with micromesh they begin to disappear.Broken22

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Broken25 The finished stem looks like new.Broken26

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Choice #3 – Splice it

On the blog, Jacek Rochacki has written of splicing a repair and reshaping the stem. I am inserting his procedure at this point to explain the choice he uses.
Instead of cutting/removing the damaged part and carving the lip/button of what is left, I would proceed in different way. Keeping in mind my wish of keeping original dimension, proportions, form, I would try to reconstruct damaged stem/mouthpiece as following:

By using sharp cutting tools – engravers/burins, scrapers or in case of better equipped “workshop corner” – cutters, like those used by jewelers for stone settings, or even a sharp pocket knife, a frame saw and needle files I would work on the damaged area making it a proper shape a piece of the same material carved that I will later shape/carve to fit what is missing. The words “making it of proper shape”, may be a subject for another longer text. But as sort of inspiration may be the different ways dentists use to “elaborate” holes in teeth so that the filling will be kept securely in place. In a stem the situation is easier as we have good binding glues and are binding together the same kind of materials – vulcanite/ebonite to vulcanite/ebonite.

When the newly carved material is fixed into the missing area with glue, I work with files and drill bits to achieve desired missing shape. Then I proceed with finishing techniques. Let us look at the pictures:Broken28

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Broken30 Others have actually cut off the broken portion of the stem after matching it to a similar style and shaped stem. The also cut off the replacement stem so that the undamaged areas match perfectly. A small stainless steel tube can be used to join the two pieces of stem together and black superglue can be used to hold it together and to fill in the joint of the two stems. Once the glue has cured then the repair can be sanded and blended together so that it does not show at all.

Choice #4 – Replace it

The fourth option is to fit a replacement stem on the pipe or make one from vulcanite or Lucite rod stock. I do not have a lathe so I usually use precast stems and do a lot of shaping and fitting and improvements on the blank. The photos below show a new stem that I fit to a Lovat pipe for a friend. I used an old saddle stem that I had here so I did not need to use a precast one. This one just needed adjustment and fiddling to make it work well.
The original stem had a large bite out of the end of it the underside next to the button.Broken31 I choose a stem that is similar in shape and style that was the same length. It had a slightly larger saddle portion on the stem but I liked the look of it and figured it would work. I turned the tenon down slightly to make for a snug fit in the mortise.Broken32 In this case I sanded the stem down to remove the oxidation from the surface and also to remove the slight tooth marks and tooth chatter that was there.Broken33

Broken34 After sanding with the 220 grit sandpaper I used a medium and a fine grit sanding sponge to clean up the stem further and remove scratches.Broken35

Broken36 I sand the finished stem with micromesh sanding pads to polish it.Broken37 After sanding with the 12000 grit pads I buffed it with Blue Diamond Plastic Polish and then with carnauba wax and a soft flannel buffing pad. The finished stem is shown below.Broken38

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