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Eye Bolts

Rigging Equipment | Eye Bolts

Chicago Hardware

(Also see Hoist Ring for angular lifts using eyebolts)

Chicago Hardware Machinery Eyebolts

1. Plain Pattern or Regular Style (non-shoulder)

  • To be used for vertical lifting only (single leg attachment at true vertical).
  • Maximum load rating for eye bolts is based on a straight vertical lift in a gradually increasing manner.

2. Shoulder Style

  • Note: Angular Lifts Should Be Avoided Whenever Possible
  • Only shoulder style eye bolts are to be used in angular lifts.
  • Angular lifts will significantly lower working load limits.
Direction of Pull Adjusted Working Load
45 degrees 30 % of rated working load
90 degrees (from vertical) 25 % of rated working load

Note: Chicago Hardware does not allow angles greater than 45 degrees.

Shoulder Shank Thread Size (NC2A) Shank Length Eye I.D. Eye O.D. Max Length Vertical Lift Max. Cap. (lbs)
21 1/4"-20 1" 3/4" 1-1/4" 3" 500
22 5/16"-18 1-1/8" 7/8" 1-1/2" 4" 900
23 3/8"-16 1-1/4" 1" 1-21/32" 4-1/2" 1400
24 7/16"-14 1-3/8" 1-3/32" 1-27/32" 4-1/2" 2000
25 1/2"-13 1-1/2" 1-3/16" 2-1/6" 4-1/2" 2600
26 9/16"-12 1-5/8" 1-9/32" 2-9/32" 4-1/2" 3000
27 5/8"-11 1-3/4" 1-3/8" 2-1/2" 4-1/2" 4000
28 3/4"-10 2" 1-1/2" 2-13/16" 5" 6000
29 7/8"-9 2-1/4" 1-11/16" 3-1/4" 5" 7000
30 1"-8 2-1/2" 1-13/16" 3-9/16" 5" 9000
31 1-1/8"-7 2-3/4" 2" 4" 2-3/4" 10000
32 1-1/4"-7 3" 2-3/16" 4-7/16" 3" 15000
34 1-1/2"-6" 3-1/2" 2-1/2" 5-3/16" 3-1/2" 19600

Froom Eye Bolts

  • Supplied with Grade 8 bolt.
  • Single working load limit based on 90-0 degree lift angle.
  • Maximum allowable lift angle: 0 degree from vertical.
  • Calculate loading based on sling to load angle (see table). Do not exceed Froom Eye Bolt working load limit.
  • Loads should always be applied to Froom Eye Bolts in the same plane as the eye. If eye does not align with the plane of lift after seating, align eye by unthreading up to a maximum of one-quarter turn (1/4).
  • Froom Eye Bolts can be supplied with extended thread projection for untapped thru material applications. Use heavy hex nut with tap and material equivalent to the bolt. The nut must have full thread engagement. Align eye to plane of lift.
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