RCS

Shaft

Size

(inches)

Helix

Plate

Thickness

(inches)

Helix

Diameter

(inches)

Working

Capacity

(lbs)

Theoretical

Installation

Torque

Required

To Attain

Working

Capacity

(ft-lbs)

Approximate

Torque at

Which Shaft

Will Begin to

Twist

(ft-lbs)

Maximum

Torque

Capacity

of Shaft

(ft-lbs)

Design

Strength of

Standard

Bracket

(lbs)

1 1/2”

3/8”

1/2”

3,600 6,000 60,000

8

10

12

14

8-10

10-12

8-10-12

8

10

12

14

8-10

10-12

8-10-12

17,500

10,000

10,000

10,000

20,000

20,000

30,000

27,500

25,000

24,900

21,125

50,000

49,800

(74,700) Note 1

3,500

2,000

2,000

2,000

4,000

4,000

6,000

5,500

5,000

4,980

4,255

(10,000) Note 2*

(9,960) Note 2*

(14,940) Note 2*

Note 1: Capacity is limited to 60,000 lbs due to maximum capacity of bracket

Note 2: Maximum torque capacity is 6,000 ft-lbs, so maximum working compressive
or tensile load is limited to 30,000 lbs

* This condition is controlling condition Working Capacity=(Installation Torque
x 10)/2

RCS

Shaft

Size

(inches)

Helix

Plate

Thickness

(inches)

Helix

Diameter

(inches)

Working

Capacity

(lbs)

Theoretical

Installation

Torque

Required

To Attain

Working

Capacity

(ft-lbs)

Approximate

Torque at

Which Shaft

Will Begin to

Twist

(ft-lbs)

Maximum

Torque

Capacity

of Shaft

(ft-lbs)

Design

Strength of

Standard

Bracket

(lbs)

1 3/4”

3/8”

1/2”

6,000 10,000 60,000

8

10

12

14

8-10

10-12

8-10-12

8

10

12

14

8-10

10-12

8-10-12

17,500

15,000

13,750

11,250

30,000

27,500

41,250

35,000

32,500

27,500

25,000

(65,000) Note 1

55,000

(82,500) Note 1

3,500

3,000

2,750

2,250

6,000

5,500

8,250

7,000

6,500

5,500

5,000

(13,000) Note 2*

(11,000) Note 2*

(16,500) Note 2*

Note 1: Capacity is limited to 60,000 lbs due to maximum capacity of bracket

Note 2: Maximum torque capacity is 10,000 ft-lbs, so maximum working compressive
or tensile load is limited to 50,000 lbs

* This condition is controlling condition Working Capacity=(Installation
Torque x 10)/2