CNC Ergon Slingshot DXF / Zwille / Steinschleuder

• Part A
• Part B
• Part C = Part A + Part C

I have converted the 3D model of the ergonomic Slingshot for CNC. You can mill two sides and then glue them together with wood glue. I rounded off the edges at the end with a router. A Slingshot can also be used very well as a template to create a copy manually with the scroll saw.

Made on CNC3018PRO

• MDF Laminate 5.6 mm (two sides glued together)
• Fxy 400 mm / minute (ideal feed for MDF)
• Fz 100 mm / minute
• milling cutter 1.58 mm (2.08 mm at CAM software)

To correct the spindle frictions, I add 0.5 mm to the real diameter of 1.58 mm. This means that for CNC3018PRO in the CAM software the diameter is given as 2.08 mm for a 1.58 mm cutter.

The material is very sturdy and feels comfortable in the hand. The outside of the laminate is protected with a layer of varnish. I painted the edges several times with wood glaze.

Pocket slingshot version

This slingshot don't fits very well in the pocket. I have created another CNC ergononic pocket slingshot (thing-5993766) model for only three fingers. You can also create a second slingshot with the same anchor point.

munition & rubber band

munition / projectiles:

• 11mm steel 5.5g
• 8mm steel 2.0g
• 5mm steel 0.5g
• 8mm clay ball 1.0g
• 6mm chickpea 0.2g
• 9mm stone 0.9g
• 12mm stone 2.0g
• 16mm stone 4.9g

rubber band:

• 13.5 lb tube black ~ 278 ft/s (84.73 m/s)
• 9.93 lb tube 2040 ~ 221 ft/s (67.36 m/s)
• 8.25 lb latex green ~ 194 ft/s (59.13 m/s)
• 4.71 lb latex yellow ~ 138 ft/s (42.06 m/s)
• 4.25 lb latex natural ~ 130 ft/s (39.62 m/s)

latex natural:

• 4.25 lb (1.93 kg) pull soft
• 130 ft/s (39.62 m/s) speed
• 4.32 Joule / 0.0055 kg steel11
• 1.57 Joule / 0.0020 kg steel8
• 0.87 Joule / 0.0005 kg steel5
• 0.39 Joule / 0.0010 kg clay ball
• 0.16 Joule / 0.0002 kg chickpea
• 0.71 Joule / 0.0009 kg stone9
• 1.58 Joule / 0.0020 kg stone12
• 3.86 Joule / 0.0049 kg stone16

latex green:

• 8.25 lb (3.75 kg) pull medium
• 194 ft/s (59.13 m/s) speed
• 9.61 Joule / 0.0055 kg steel11
• 3.50 Joule / 0.0020 kg steel8
• 0.78 Joule / 0.0005 kg steel5
• 1.75 Joule / 0.0010 kg clay ball
• 0.35 Joule / 0.0002 kg chickpea
• 1.57 Joule / 0.0009 kg stone9
• 3.49 Joule / 0.0020 kg stone12
• 8.55 Joule / 0.0049 kg stone16

tube black:

• 13.5 lb (6.14 kg) pull strong
• 278 ft/s (84.73 m/s) speed
• 19.74 Joule / 0.0055 kg steel11
• 7.18 Joule / 0.0020 kg steel8
• 1.79 Joule / 0.0005 kg steel5
• 3.59 Joule / 0.0010 kg clay ball
• 0.72 Joule / 0.0002 kg chickpea
• 3.23 Joule / 0.0009 kg stone9
• 7.18 Joule / 0.0020 kg stone12
• 17.59 Joule / 0.0049 kg stone16

hunting shoots:

• bird (head) 15 Joule (11 FPE)
• squirrel (head) 15 Joule (11 FPE)
• rabbit (head) 15 Joule (11 FPE)
• fox (rib) 50 Joule (35 FPE)
• deer (rib) 200 Joule (150 FPE)
• hog (rib) 270 Joule (200 FPE)

The survey shows that for hunting would need very strong rubber bands and heavy ammunition. In many countries hunting with a slingshot is not allowed.