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Eprouvette Mortar Pricing

“B.N.A. Eprouvettes” are custom made castings, manufactured to stringent quality standards exclusively for Beaufort Naval Armorers. The original Eprouvette Mortar design was used in the 1700's and 1800's for testing and grading of black powder. The following three mortars are the only B.N.A. cannon type or style that is produced from castings. All other BNA signal cannons and replica cannons are machined and manufactured from rolled shaft stock.

B.N.A. Mortars are a convenient size, heavy duty, high quality, and great fun to fire!  They are louder than any gun or signal cannon and they can be blank fired. The bore in all three styles of BNA mortars are lathe bored to be 1.7” nominal. This assures the structural integrity as well as a clean smooth bore. The powder chamber and vent are then machined. The ‘BNA Original Cast Iron Eprouvettes’ are slightly larger that the ‘BNA Bronze Eprouvettes’. (Other size BNA mortars besides the following three would be custom orders.)

Bronze Eprouvette1 - B.N.A. Bronze Eprouvettes are cast from high strength manganese bronze. Machine shop labor is used to “Artisan Craft” each rough casting. Each mortar is completely lathe bored to assure structural integrity and a clean smooth bore. The powder chamber and vent are added, and all outer surfaces are machinery cut, polished, and finished. Weight is 6.25 Lbs. Height is 4.5” Length is 5.5” Width is 3.25”

**SOLD OUT**

 

 

Machined Bronze Eprouvette2 - B.N.A. Machined Stainless Steel Eprouvettes are now being offered! ALL B.N.A. Eprouvette mortars have more than adequate strength to withstand unlimited blank firing loads, but still, stainless steel is the strongest material of all of the B.N.A. mortars. Machining stainless steel is time consuming and labor intensive. Stainless steel stays shiny and attractive with minimal care, i.e. no rust and little polishing needed. These mortars are virtually indestructible. They are crafted from marine grade stainless steel, high tensile strength 3.25" propeller shafting. Height is 5" Length 5.75" Width 3.5" Base 3.5" x 4" and Weight is 8.6 lbs.

Price On Request

 

Machined Bronze Eprouvette3 - B.N.A. Machined Bronze Eprouvettes are machined from round 3.25” bronze bar stock. The upgraded 2006 bronze mortar design very closely resembles the previous design with finishing lines being more crisp and sharp and the overall size being slightly larger. BNA bronze mortars are now fully machined, no more casting is involved. Alloy 464 Naval Brass, also known as Tobin Bronze, is an excellent bar stock material for manufacturing BNA bronze mortars due to its superior quality. It is also highly corrosion resistant. Firing capabilities, esthetic appeal, attractive appearance, larger size, and the price all remain the same and better for the heavier upgraded bronze mortar. Weight is 9.25 Lbs. Height is 5” Length is 5.75” Width is 3.5”

Price On Request

 

Cast Iron Eprouvette4 - B.N.A. Original Cast iron Eprouvettes are cast from high strength ductile, or nodular, iron. (Ductile iron is the same as auto crankshaft material.) The mortar base is part of the casting. The outer surfaces of the cast iron Eprouvettes are painted with black enamel. They are heavy and weigh just over 9 lbs. Height 5 1/8”, Length 5 ¾”, Width 3 ½”.

**SOLD OUT**

 

Deluxe Cast Iron Eprouvette5 - B.N.A. Deluxe Cast Iron Eprouvette Mortars are a machined and blued version of the BNA cast ductile iron Eprouvette mortar. This mortar has a more advanced outer finish. It has been fully machined and polished, then heat processed, blued, and quenched with oil to provide finish protection. Weight just over 9 lbs., Height 5 1/8”, Length 5 ¾”, Width 3 ½”.

Price On Request


 

These mortars are shipping with:

Please inquire about future availability of mortar firing supplies if interested.