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Ring Mandrels
Form...Enlarge...Measure...Straighten
All mandrels are hardened & polished tool steel, graduated in 1/4 sizes. They have a long, smooth taper to provide adequate work space and good balance. The handles are knurled for a better grip.
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Part Number
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Description
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R-
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Standard Mandrel - Sizes 1-12 12" Long 1.5#
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RG-
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Grooved Standard Mandrel - Sizes 1-12 12" Long 1.5#
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RL-16*
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Larger Mandrel - Sizes 1-16 13.5" Long 2#
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RG-16*
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Grooved Larger Mandrel - Sizes 1-16 13.5" Long 2#
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RF-16*
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Flat sided Ring Mandrel for forming, straightening or enlarging bezel set rings. Can also be used in place of a grooved mandrel for faceted stones. Sizes 1-16 13.5" Long 2#
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Big Maxi
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Larger Mandrel for large rings, hoop earrings, coin holders, etc. Sizes 1-16 8.25" Long 2#
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R-16 STP*
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Stepped Ring Mandrel Full sizes 4-16 1" Steps 13.5" Long 2#
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R-15.5 STP*
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Stepped Ring Mandrel Half Sizes 3.5-15.5 1" Steps 13.5" Long 2#
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STR-Ring Stretcher
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Thimble Mandrel 7" Long inexpensive and Simple to use. Size 4 - 15 12oz
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Specialty Mandrels
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Part Number
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Description
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T-
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Taper - for Bola Tips, Squash Blossoms, Jump Rings, Cones, Baby Rings, etc. 7.75" Long 1/2" to 1/32" Taper 1/4#
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SR-
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Swiss Round 11" Long x 1/2" to 1/8" Taper Hardened - High Polish
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SO-
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Swiss Oval Same as above
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SS-
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Swiss Square Same as above
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SRT-
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Swiss Style Rectangle Same as above
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STD-
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Swiss Style Teardrop*
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S-TRI-
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Swiss Style Triangle*
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* Corners are left sharp. Customers may round or chamfer to adapt for cushion cut or octagonal cut stones.
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Tapered Spindles (back to top)
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Part Number
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Description
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TSP-5/8
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Tapered Spindle 5/8" Right or Left 5oz
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TSP-1/2
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Tapered Spindle 1/2" Right or Left 4oz
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TSP-5/16
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Tapered Spindle 5/16" Right or Left 3oz
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TSP-3/8
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Tapered Spindle 3/8" Right or Left 3oz
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TSP-1/4
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Tapered Spindle 1/4" Right or Left 3oz
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TSP-3/8
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(for Baldor Quick Change Lathe)
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Special Shaped Mandrels
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Part Number
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Description
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R-SQ-
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Square Mandrel - A Rounded Square 13.5" Long 1.75# Unmarked Sizes 4-15
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R-SQ-MOD
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A Rounded Modified Square - Conforms to the natural shape of the finger. Comfortable and no more turning or twisting rings
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RM-
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Oval Bezel Mandrel 12" Long - 3/4" - 5/16" 1/2#
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TD-
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Teardrop Bezel Mandrel 12" Long - 3/4" - 5/16" 1/2#
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Jarvi New Products (back to top)
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Part Number
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Description
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L-RL
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Large Rectangle Mandrel
Largest Dimension 2.0cm x 1.5cm
Smallest Dimension 0.9cm x 0.65cm
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L-CC-RT
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Cut Corner Rectangle Mandrel
Same as above , except flat corners.
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L-SQ
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Square Mandrel
Largest dimension 1.8cm
Smallest dimension 0.7cm
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L-CC-SQ
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Cut Square Corner Mandrel
Same as above except flat corners
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L-TRI
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Triangle Mandrel
Largest side dimension 2.2cm
Smallest side dimension 1.0cm
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L-CC-TRI
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Cut Corner Triangle Mandrel
Same as above except for flat corners
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L-OCT
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Octagon Mandrel
Largest diameter 2.4cm
Smallest dimension 0.7cm
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L-HEX
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Hexagon Mandrel
Largest dimension 2.2cm
Smallest dimension 0.7cm
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Bracelet Mandrels (back to top)
For shaping and stretching Bracelets and Ovals
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Part Number
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Description
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RSBM
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Round Stepped
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OSBM
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Oval Stepped
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RTBM
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Round Tapered
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OCTM
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Oval Tapered
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