TECHNICAL INFORMATION
3R8-68N3B DRAWING AND SPECIFICATION
3R8-68N3B SPECIFICATION
Slewing Bearing: 3R8-68N3B
Inner diameter (di): 58.796 in
Outer diameter (Da): 74.500 in
Overall height (H): 5.620 in
Outer ring height (Ho): 5.430 in
Inner ring height (Hi): 5.000 in
Weight: 2070 Ibs
External bolt circle dia (Lo): 72.000 in
Number of bolt holes per hole circle (no):28
External bolt hole type : Selected by user
External bolt hole diameter (Bo): 1.19 in
Internal bolt circle dia (Li): 64.125 in
Number of bolt holes per hole circle (ni):48
Internal bolt hole type : Selected by user
Internal bolt hole diameter (Bi): 1.31 in
Tooth number (z):89
Module of gear (DP):1.5
Tooth width (b2): 5.000 in
3R8-68N3B DRAWING
3R8-68N3B drawing is reference for user, if you request for 3R8-68N3B formal drawing , please contact with us: sales@jcb-bearing.com, the 3R8-68N3B official drawing will be submitted to user.
RAW MATERIAL
- For slewing bearing ring , usually the raw material is alloy steel, such as 50Mn, C45E, 42CrMo (DIN 42CrMo4, AISI 4142), and some special non-ferrous metals, such as aluminum, stainless steel and so on, it should be selected according to user’s application if user have special request.
- For slewing bearing cage, 1). steel 2). Nylon 66 or 1010 (Polyamide66) 3). Polyetheretherketone 4. Brass 5. Other cage materials.
- For spacer, raw material should be Nylon 66 (Polyamide66) or Nylon 1010. it should be selected according to user’s application if user have special request.
- For seal, raw material is oil resistant rubber I-3, or other special raw material for seal.
- Rolling element (ball or roller), high chrome alloy bearing steel,GCr15 and GCr15SiMn, or stainless steel.