77
216
402
403
241
240
379
238
239
205
144
1574
639
9051
9052
5-17°
 9052 
*#10 (5 mm) FH fastener.     **6 mm (1/4") FH fastener.     ‡#10 (5 mm) RH fastener.     ‡‡#8 (4 mm) RH fastener.
Cam-Matic ball bearing cam cleats.
Swivels freely under load.
Stops on base prevent swivel from 
over-rotating and fouling line.
Cam Bases
Use cam swivel bases when leads must rotate 
to face the trimmer.
Ball bearing swivel bases feature dual rows of Delrin® 
ball bearings that swivel freely even under high loads. 
Bases include stand-up springs and a U-Adaptor to 
accept a variety of appropriate blocks.
The 144 is the standard configuration with a tall arm. 
It is ideal for mounting in the cockpit or for use on 
larger keelboats and small offshore boats that use 76 
mm (3") plastic blocks. The low-
profile 205 is used when installation is at deck 
level and when smaller blocks are used. The 
1574 accepts Midrange blocks.
The 216 features a second cleat for lines led 
vertically through the base of the swivel. It is 
frequently used to combine vang or backstay 
controls in the same swivel base that handles 
the mainsheet.
The 240, 241 and 639 are simple swivel bases 
for main and jib sheets on very small boats or 
for control lines on boats of all sizes.
The 402 and 403 are fitted with a double
Cam-Matic cleat for use in 2-speed
mainsheet systems.
The 9051 and 9052 adjustable cam swivel base with 
468 Micro Cam-Matic cleat provides precise 
cleating. The cleating angle adjusts infinitely in a 5-17 
degree range up and down for optimal line lead. In 
the 9051 the 16 mm sheaves feature low-friction 
stainless steel ball bearings to handle high loads, 
ideal for controls where cleating angles change dra-
matically. 
144 includes adapter for 57 mm 
and 75 mm Carbo blocks.
Delrin is a registered trademark of E. I. du Pont 
de Nemours and Company or its affiliates.
Part No. Description
Height
Weight
Line Ø
Fastener
spacing
Maximum
working load
Use with
Min
Max
in
mm
oz
g
in
mm
in
mm
in
mm
lb
kg
 144 
 Swivel base/150 Cam-Matic* 
 5 3/4 
 146 
 13 
 369  1/8 
 3 
 1/2  12 
 3/4 
 19 
 
 
 57 mm/75 mm/2.25"/3.00"/ratchets 
 205 
 Small swivel base/150 Cam-Matic* 
 4 1/2 
 114 
 12 
 340  1/8 
 3 
 1/2  12 
 3/4 
 19 
 
 
 57 mm/Big Bullet/Dinghy/2.25"/small 
ratchets 
 216 
 Duocam swivel base/365, 471 Carbo-Cam* 
 5 3/4 
 146 
 16 
 454 
 
 
 
 
 3/4 
 19 
 
 
 57 mm/2.25"/3.00"/ratchets 
 238 
 150 Cam-Matic on plate/bullseye‡ 
 1 5/16 
 33 
 4 
 113  1/8 
 3 
 1/2  12  1 1/2, 1  38, 25 
 300 
 136 
 
 239 
 365 Carbo-Cam on plate/bullseye‡ 
 1 5/16 
 33 
 3 
 85 
 1/8 
 3 
 3/8  10  1 1/2, 1  38, 25 
 200 
 91 
 
 240 
 Bullseye swivel base/150 Cam-Matic* 
 2 7/16 
 62 
 7.5 
 213  1/8 
 3 
 1/2  12 
 1 1/32 
 26 
 300 
 136 
 
 241 
 Bullseye swivel base/365 Carbo-Cam* 
 2 7/16 
 62 
 6.5 
 184  1/8 
 3 
 3/8  10 
 1 1/32 
 26 
 150 
 68 
 
 379 
 471 Micro Carbo-Cam on plate/bullseye‡‡ 
 7/8 
 22 
 1.75 
 50 
 1/8 
 3 
 1/4 
 6 
 1 1/16 
 27 
 150 
 68 
 
 402 
 Small swivel base/412 Cam-Matic* 
 4 3/8 
 111  12.75  362  5/16  8 
 3/8  10 
 3/4 
 19 
 
 
 57 mm/2.25" double ratchets 
 403 
 Swivel base/412 Cam-Matic* 
 5 3/4 
 146 
 14 
 398  5/16  8 
 3/8  10 
 3/4 
 19 
 
 
 57 mm/2.25"/3.00" double ratchets 
 639 
 Bullseye swivel base/150 Cam-Matic* 
 1 15/16 
 75 
 9.14  259  1/8 
 3 
 1/2  12 
 1 1/32 
 26 
 300 
 136 
 
 1574 
 Midrange swivel base/280 Cam-Matic** 
 5 15/16  151 
 23 
 652  1/4 
 6 
 5/8  16 
 1 1/16 
 27 
 
 
 Midrange 
 HSB538  Swivel base/471 Micro Carbo-Cam/Bullseye 
 1 13/16 
 46 
 3.7 
 105  1/8 
 3 
 1/4 
 6 
 1 1/32 
 26 
 150 
 68 
 
 9051 
 Swivel base/468 Micro Cam-Matic/16 mm sheaves 
 2 3/8 
 60 
 6.1 
 173  1/8 
 3 
 1/4 
 6 
 1 1/32 
 26 
 200 
 91 
 
 
 Swivel base/468 Micro Cam-Matic/Bullseye 
 2 3/8 
 60 
 5.6 
 160  1/8 
 3 
 1/4 
 6 
 1 1/32 
 26 
 200 
 91 
 
Loosen screws to adjust 
9051/9052 cam angle.

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