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Gate Roller Links and Pins

 
  
 
Class 2, Grade B8 Nuts shall conform to ASTM A 194/A 194M, Grade 8A.
c.
Gate Roller Links and Pins
(1)  Links - ASTM A 276, UNS S30400 or S41000, Condition A,
hot-finished or cold-finished, Class A.
(2)  Pins - ASTM A 276, UNS S21800, Condition A, cold-finished or
hot-rolled and machine-finished to the tolerances specified in
ASTM A 484/A 484M for cold-finished round bars, Class C.
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NOTE: It is contemplated that the pin diameter and
tolerances shown will be the minimum size and
tolerances as given in ASTM A 484/A 484M for cold
finished round bars.  Machined pins should have a
surface roughness of not exceeding 1.6 micrometers
(63 microinches).  Minimum diameter of holes in bars
shall be the maximum pin size plus an allowance of
0.2 mm (0.008 inch) for a free fit.  Minimum
diameter of holes in rollers should be the nominal
diameter of the pin plus 1 mm (1/32 inch).  The
length of the pin between retainer ring grooves
should be based on the maximum width of the roller,
the maximum thickness of the hot-finished bars
rolled to the tolerances given in ASTM A 484/A 484M
plus a clearance of approximately 1 mm (0.040 inch)
to avoid binding between bars, or binding between
bars and rollers.
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d.  Retaining rings for gate roller links shall be corrosion resistant
steel conforming to ASME B27.7, BASIC external series type with nominal
ring size of [_____] mm inches.
e.  Seal Plates, Bars, and Retainers; Roller Guide Bars; and Track
Plates.
(1)  Welded Seal Plates and Bars; Welded Roller Guide Bars; and
Welded Track Plates - ASTM A 240/A 240M, UNS [S40500] [S41008]
[S30400], Hot-Rolled and Annealed or Heat Treated, and Blast
Cleaned or Pickled Finish; or ASTM A 276, UNS S30400, S40500, or
S41000 with a maximum carbon content of 0.08 percent, Condition A,
Hot-Finished or Cold-Finished, Class C.
(2)  Bolted Seal Plates, Bars, and Retainers; and Bolted Roller
Guide Bars - ASTM A 240/A 240M, UNS [S40500] or [S41008] [S30400],
Hot-Rolled and Annealed or Heat Treated, and Blast Cleaned or
Pickled finish; or ASTM A 276, UNS S30400, S40500, or S41000,
Condition A, hot-finished or cold-finished, Class C.
2.1.5.5
Pipe
ASTM A 312/A 312M, [seamless] [welded], UNS S30400, NPS and schedule number
or outside diameter and nominal wall thickness as shown, [plain] [threaded]
[threaded and coupled] ends.
SECTION 05502A
Page 13


   


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