Lornic Design offers 2 different backer paddles.  The "HD" style and the "SD" style.  

The difference is the spacing of the mounting bolts from the bottom of the paddle to the bolts.  

"HD" backers should be used on Heavy Duty Paddles ( 593 Series )

​"SD" backers should be used on Standard Duty Paddles ( 393 Series )

393 Backer Paddle Sales Drawing

bolt plates

NEW Heavy Duty Bolt Plate


Features a larger mounting surface and larger radius to prevent stress cracks in the paddles.
  • 1/2" Bolt Holes, Part Number "SB HD 262"
  • 5/8" Bolt Holes, Part Number "SB HD 562"
  • 62mm / 2-1/2" Bolt Spacing
  • Armor Galv Plated Steel

Proven to increase paddle life!

"HD" Backer on HD Paddle
"SD" Backer on HD Paddle
(Note the 1/8" gap at the bottom)

backer Paddles

Standard Bent Bolt Plate


  • 1/2" Bolt Holes, Part Number "SB 262"
  • 5/8" Bolt Holes, Part Number "SB 562"
  • 62mm / 2-1/2" Bolt Spacing
  • Zinc Plated Steel

Tel: 616-594-0355

12613 James Street Ste 10 Holland MI 49424 US

Lornic Design