20 SERIES LIGHT MEDIUM DUTY CASTERS
Heavy embossed, formed steel double cup.
Double row ball bearing swivel raceway.
Bright zinc or chrome plated finish.
Octal Top Raceway is available.
FASTENING SPECIFICATIONS
FASTENING TYPE
FASTENING SHAPE
CODE NO
SPECIFICATIONS
TOP PLATE
A1
OVERALL SIZE : 2-3/8X3-5/8
BOLT HOLE SPACING : 1-3/4X2-11/16 to 2-15/16
ATTACHING BOLT SIZE : 5/16
A2
OVERALL SIZE : 3-1/8X4-1/8
BOLT HOLE SPACING : 1-3/4X2-15/16 to 2-3/8X3-3/8
ATTACHING BOLT SIZE : 3/8
A3
OVERALL SIZE : 3-15/16X4-1/2
BOLT HOLE SPACING : 2-5/8X3-5/8 TO 3X3
THREADED STEM
B1
1/2xUNC13x1
B2
1/2xUNC13x1-1/2
B3
5/8xUNC11x1-1/4
B4
1/2xUNC13x2
B5
1/2xUNC20x3
B6
7/16xUNC14x7/8
B7
1/2xUNC13x2-1/2(Can be used with Exp Applicator)
B8
7/16xUNC14x1-1/2
B9
1/2xUNC13x3
B11
1/2xUNC13x3/4
B16
5/8xUNC11x1-1/2
B17
3/4xUNC10x1-1/2
B18
3/4xUNC10x1
GRIP RING STEM
D1
7/16x1-1/2
D2
27/32x2-1/2
ROUND STEM
E1
7/8x2-3/32 with 5/16 Cross Drilled hole 1-1/8 from top of the upper cup.
E2
1x2-1/4 with 5/16 Cross Drilled hole 1-7/16 from top of the upper raceway.
E3
1x2-1/2(3/8") with 3/8 Cross Drilled hole 1-7/64 from top of the upper raceway.
OCTAGON STEM
F1
27/32x2-7/16 with 1/4 Cross Drilled hole located at 1/2, 1-1/8, 1-3/4 1-1/8 from top of the raceway.
ACCESSORIES OPTIONS
ACCESSORIES CODE
DESCRIPTION
TB
TG
SL
CP
BO
NI
ZA
STS
TOP LOCK BRAKE
THREAD GUARD
SEALED SWIVEL
CHROME PLATING
BLACK OXIDE PLATING
NICKEL PLATING
ZERK AXLE
STAINLESS STEEL YOKE
20 SERIES SPECIFICATIONS
CASTER PART NUMBER
WHEEL SPECIFICATION
CASTER SPECIFICATION
SWIVEL
RIGID
DIA
TREAD WIDTH
TYPE
BEARING
AXLE DIA
OVERALL HEIGHT
SWIVEL RADIUS
LOAD CAPACITY
20 30 S A1 SR
20 30 S A1 SBB
20 30 S A1 HR
20 30 S A1 HBB
20 30 S A1 LP
20 30 S A1 HP
20 30 S A1 PU
20 30 S A1 PB
20 30 S A1 INF
20 30 S A1 PH
20 30 S A1 SS
20 30 R A1 SR
20 30 R A1 SBB
20 30 R A1 HR
20 30 R A1 HBB
20 30 R A1 LP
20 30 R A1 HP
20 30 R A1 PU
20 30 R A1 PB
20 30 R A1 INF
20 30 R A1 PH
20 30 R A1 SS
3
1-1/4
SOFT RUBBER
HARD RUBBER
LIGHT DUTY PLASTIC
HEAVY DUTY PLASTIC
POLYURETHANE
INFINITE
PHENOLIC
STEEL
NYLON
BALL
PLAIN
BALL/DELRIN
ANNULAR/DELRIN
STEEL BUSHING
3/8
4-1/4
125
220
300
240
250
20 35 S A1 SR
20 35 S A1 HR
20 35 S A1 HP
20 35 S A1 PB
20 35 S A1 INF
20 35 S A1 RA
20 35 R A1 SR
20 35 R A1 HR
20 35 R A1 HP
20 35 R A1 PB
20 35 R A1 INF
20 35 R A1 RA
3-1/2
GRAY RUBBER ON ALUMINUM
ANNULAR
4-1/2
130
225
260
20 40 S A1 SR
20 40 S A1 SBB
20 40 S A1 HR
20 40 S A1 HBB
20 40 S A1 LP
20 40 S A1 HP
20 40 S A1 PB
20 40 S A1 INF
20 40 S A1 SS
20 40 S A1 RA
20 40 S A1 PH
20 40 S A1 HTP
20 40 R A1 SR
20 40 R A1 SBB
20 40 R A1 HR
20 40 R A1 HBB
20 40 R A1 LP
20 40 R A1 HP
20 40 R A1 PB
20 40 R A1 INF
20 40 R A1 SS
20 40 R A1 RA
20 40 R A1 PH
20 40 R A1 HTP
4
HIGH TEMPERATURE
5-1/8
165
265
275
280
20 50 S A1 SR
20 50 S A1 SBB
20 50 S A1 HR
20 50 S A1 HBB
20 50 S A1 LP
20 50 S A1 HP
20 50 S A1 PB
20 50 S A1 INF
20 50 S A1 RA
20 50 S A1 PH
20 50 S A1 HTP
20 50 R A1 SR
20 50 R A1 SBB
20 50 R A1 HR
20 50 R A1 HBB
20 50 R A1 LP
20 50 R A1 HP
20 50 R A1 PB
20 50 R A1 INF
20 50 R A1 RA
20 50 R A1 PH
20 50 R A1 HTP
5
6-5/32
175
320
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