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C.R.T. (Constant Reaction Tensioner)
ROLLER CHAIN TENSIONERS

 regina 6

Commonly used chain tensioners give a tensioning force which is usually provided by a direct acting spring. Thus, when the chain is new and the tensioning force required is low, the spring is compressed and maximum force is provided; the contrary when the chain has "stretched" with use the spring expands and only minimum force is delivered.
Regina Constant Reaction Tensioner (C.R.T.) solves this problem and delivers a virtual constant force by means of a unique compensating parallelogram principle. This means that the chain tensioning force (reaction) is effectively constant regardless of the position and length of the chain.
This Regina design is patented. Regina C.R.T. is supplied for the chain types listed in the following pages. For each chain type there are three types of sliding block in special antifriction material. The choice depends upon the stroke required from the tensioner. For normal straight line usage model N 45 is recommended.

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CRT 1 TENSIONERS
      SLIDING BLOCK TENSIONER FORCE
CHAIN IS0 ref. Number Regina Chain Number Sliding Block R h I w z a b c d e f g  
      mm mm mm mm mm mm mm mm mm mm mm mm kg
06 B1 121 45 170 73 106.5 4.2 10.5 38 26 6.5 16.5 9.2 38 53 6
06 B1 121 90 95 78 111.5 4.2 10.5 38 26 6.5 16.5 9.2 38 53 6
06 B1 121 180 62 98 131.5 4.2 10.5 38 26 6.5 16.5 9.2 38 53 6
06 C1 A35 45 170 73 106.5 4.2 10.5 38 26 6.5 16.5 9.2 38 53 6
06 C1 A35 90 95 78 111.5 4.2 10.5 38 26 6.5 16.5 9.2 38 53 6
06 C1 A35 180 62 98 131.5 4.2 10.5 38 26 6.5 16.5 9.2 38 53 6
08 B1 126 45 170 73 106.5 7 16 38 26 6.5 16.5 9.2 38 53 6
08 B1 126 90 95 78 111.5 7 16 38 26 6.5 16.5 9.2 38 53 6
08 B1 126 180 62 98 131.5 7 16 38 26 6.5 16.5 9.2 38 53 6
08A1 A40 45 170 73 106.5 7 16 38 26 6.5 16.5 9.2 38 53 6
08A1 A40 90 95 78 111.5 7 16 38 26 6.5 16.5 9.2 38 53 6
08A1 A40 180 62 98 131.5 7 16 38 26 6.5 16.5 9.2 38 53 6
10 B1 136 45 170 73 106.5 8.5 19 38 26 6.5 16.5 9.2 38 53 12
10 B1 136 90 95 78 111.5 8.5 19 38 26 6.5 16.5 9.2 38 53 12
10 B1 136 180 62 98 131.5 8.5 19 38 26 6.5 16.5 9.2 38 53 12
10 A1 A50 45 170 73 106.5 8.5 19 38 26 6.5 16.5 9.2 38 53 12
10 A1 A50 90 95 78 111.5 8.5 19 38 26 6.5 16.5 9.2 38 53 12
10 A1 A50 180 62 98 131.5 8.5 19 38 26 6.5 16.5 9.2 38 53 12
12 B1 140 45 170 73 106.5 11 19 38 26 6.5 16.5 9.2 38 53 12
12 B1 140 90 95 78 111.5 11 19 38 26 6.5 16.5 9.2 38 53 12
12 B1 140 180 62 98 131.5 11 19 38 26 6.5 16.5 9.2 38 53 12
12 A1 A60 45 170 73 106.5 11 19 38 26 6.5 16.5 9.2 38 53 12
12 A1 A60 90 95 78 111.5 11 19 38 26 6.5 16.5 9.2 38 53 12
12 A1 A60 180 62 98 131.5 11 19 38 26 6.5 16.5 9.2 38 53 12
06 B2 221 45 170 73 106.5 4.2 14 38 26 6.5 16.5 9.2 38 53 12
06 B2 221 90 95 78 111.5 4.2 14 38 26 6.5 16.5 9.2 38 53 12
06 B2 221 180 62 98 131.5 4.2 14 38 26 6.5 16.5 9.2 38 53 12
06 C2 A35-2 45 170 73 106.5 4.2 14 38 26 6.5 16.5 9.2 38 53 12
06 C2 A35-2 90 95 78 111.5 4.2 14 38 26 6.5 16.5 9.2 38 53 12
06 C2 A35-2 180 62 98 131.5 4.2 14 38 26 6.5 16.5 9.2 38 53 12
08 B2 226 45 170 73 106.5 6.5 20 38 26 6.5 16.5 9.2 38 53 12
08 B2 226 90 95 78 111.5 6.5 20 38 26 6.5 16.5 9.2 38 53 12
08 B2 226 180 62 98 131.5 6.5 20 38 26 6.5 16.5 9.2 38 53 12
08 A2 A40-2 45 170 73 106.5 6.5 20 38 26 6.5 16.5 9.2 38 53 12
08 A2 A40-2 90 95 78 111.5 6.5 20 38 26 6.5 16.5 9.2 38 53 12
08 A2 A40-2 180 62 98 131.5 6.5 20 38 26 6.5 16.5 9.2 38 53 12

CRT 2 TENSIONERS
      SLIDING BLOCK TENSIONER FORCE
CHAIN IS0 ref. Number Regina Chain Number Sliding Block R h I w z a b c d e f g  
      mm mm mm mm mm mm mm mm mm mm mm mm kg
16 B1 147 45 200 91 133 15 30 45 34 8.5 20 13 42 63 18
16 B1 147 90 100 93 135 15 30 45 34 8.5 20 13 42 63 18
16 B1 147 180 74 119 161 15 30 45 34 8.5 20 13 42 63 18
16 A1 A 80 45 200 91 133 15 30 45 34 8.5 20 13 42 63 18
16 A1 A 80 90 100 93 135 15 30 45 34 8.5 20 13 42 63 18
16 A1 A 80 180 74 119 161 15 30 45 34 8.5 20 13 42 63 18
20 B1 152 45 200 91 133 18 38 45 34 8.5 20 13 42 63 24
20 B1 152 90 100 93 135 18 38 45 34 8.5 20 13 42 63 24
20 B1 152 180 74 119 161 18 38 45 34 8.5 20 13 42 63 24
20 A1 A 100 45 200 91 133 18 38 45 34 8.5 20 13 42 63 24
20 A1 A 100 90 100 93 135 18 38 45 34 8.5 20 13 42 63 24
20 A1 A 100 180 74 119 161 18 38 45 34 8.5 20 13 42 63 24
10 B2 236 45 200 91 133 8 25.5 45 34 8.5 20 13 42 63 18
10 B2 236 90 100 93 135 8 25.5 45 34 8.5 20 13 42 63 18
10 B2 236 180 74 119 161 8 25.5 45 34 8.5 20 13 42 63 18
10 A2 A 50-2 45 200 91 133 8 25.5 45 34 8.5 20 13 42 63 18
10 A2 A 50-2 90 100 93 135 8 25.5 45 34 8.5 20 13 42 63 18
10 A2 A 50-2 180 74 119 161 8 25.5 45 34 8.5 20 13 42 63 18
12 B2 240 45 200 91 133 9.5 30 45 34 8.5 20 13 42 63 24
12 B2 240 90 100 93 135 9.5 30 45 34 8.5 20 13 42 63 24
12 B2 240 180 74 119 161 9.5 30 45 34 8.5 20 13 42 63 24
12 A2 A 60-2 45 200 91 133 9.5 30 45 34 8.5 20 13 42 63 24
12 A2 A 60-2 90 100 93 135 9.5 30 45 34 8.5 20 13 42 63 24
12 A2 A 60-2 180 74 119 161 9.5 30 45 34 8.5 20 13 42 63 24
16 B2 247 45 200 91 133 13.5 43.5 45 34 8.5 20 13 42 63 24
16 B2 247 90 100 93 135 13.5 43.5 45 34 8.5 20 13 42 63 24
16 B2 247 180 74 119 161 13.5 43.5 45 34 8.5 20 13 42 63 24
16 A2 A 80-2 45 200 91 133 13.5 43.5 45 34 8.5 20 13 42 63 24
16 A2 A 80-2 90 100 93 135 13.5 43.5 45 34 8.5 20 13 42 63 24
16 A2 A 80-2 180 74 119 161 13.5 43.5 45 34 8.5 20 13 42 63 24

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CRT 0 TENSIONERS
      SLIDING BLOCK TENSIONER FORCE
CHAIN IS0 ref. Number Regina Chain Number Sliding Block R h I w z a b c d e f g  
      mm mm mm mm mm mm mm mm mm mm mm mm kg
05 B1 105 60 90 61.5 95 2.7 16 38 24 6.5 16.5 9.2 28 53 8
05 B1 105 180 50 85 117.5 2.7 16 38 24 6.5 16.5 9.2 28 53 8
06 B1 121 60 90 61.5 95 4.2 16 38 24 6.5 16.5 9.2 28 53 8
06 B1 121 180 50 85 117.5 4.2 16 38 24 6.5 16.5 9.2 28 53 8
06 C1 A 35 60 90 61.5 95 4.2 16 38 24 6.5 16.5 9.2 28 53 8
06 C1 A 35 180 50 85 117.5 4.2 16 38 24 6.5 16.5 9.2 28 53 8
08 B1 126 60 90 61.5 95 7 16 38 24 6.5 16.5 9.2 28 53 8
08 B1 126 180 50 85 117.5 7 16 38 24 6.5 16.5 9.2 28 53 8
08 A1 A 40 60 90 61.5 95 7 16 38 24 6.5 16.5 9.2 28 53 8
08 A1 A 40 180 50 85 117.5 7 16 38 24 6.5 16.5 9.2 28 53 8
10 B1 136 60 90 61.5 95 8.5 16 38 24 6.5 16.5 9.2 28 53 8
10 B1 136 180 50 85 117.5 8.5 16 38 24 6.5 16.5 9.2 28 53 8
10 A1 A 50 60 90 61.5 95 8.5 16 38 24 6.5 16.5 9.2 28 53 8
10 A1 A 50 180 50 85 117.5 8.5 16 38 24 6.5 16.5 9.2 28 53 8
12 B1 140 60 90 61.5 95 11 16 38 24 6.5 16.5 9.2 28 53 8
12 B1 140 180 50 85 117.5 11 16 38 24 6.5 16.5 9.2 28 53 8
12 A1 A 60 60 90 61.5 95 11 16 38 24 6.5 16.5 9.2 28 53 8
12 A1 A 60 180 50 85 117.5 11 16 38 24 6.5 16.5 9.2 28 53 8
05 B2 205 60 90 61.5 95 2.5 8.2 38 24 6.5 16.5 9.2 28 53 8
05 B2 205 180 50 85 117.5 2.5 8.2 38 24 6.5 16.5 9.2 28 53 8
06 B2 221 60 90 61.5 95 4.2 14 38 24 6.5 16.5 9.2 28 53 8
06 B2 221 180 50 85 117.5 4.2 14 38 24 6.5 16.5 9.2 28 53 8
06 C2 A 35-2 60 90 61.5 95 4.2 14 38 24 6.5 16.5 9.2 28 53 8
06 C2 A 35-2 180 50 85 117.5 4.2 14 38 24 6.5 16.5 9.2 28 53 8
08 B2 226 60 90 61.5 95 6.6 20 38 24 6.5 16.5 9.2 28 53 8
08 B2 226 180 50 85 117.5 6.6 20 38 24 6.5 16.5 9.2 28 53 8
08 A2 A 40-2 60 90 61.5 95 6.6 20 38 24 6.5 16.5 9.2 28 53 8
08 A2 A 40-2 180 50 85 117.5 6.6 20 38 24 6.5 16.5 9.2 28 53 8
10 A2 236 60 90 61.5 95 8 25.5 38 24 6.5 16.5 9.2 28 53 8
10 A2 236 180 50 85 117.5 8 25.5 38 24 6.5 16.5 9.2 28 53 8
10 B2 A 50-2 60 90 61.5 95 8 25.5 38 24 6.5 16.5 9.2 28 53 8
10 B2 A 50-2 180 50 85 117.5 8 25.5 38 24 6.5 16.5 9.2 28 53 8

Note: ISO ref. numbers containing 'B' are for metric or british chain sizes,
while ISO ref. numbers containing 'A' are for american chain sizes.

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Stress / Movement Diagram

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