Simplicity 821RT manual Hardware Identification & Torque Specifications, Dia

Page 26

Hardware Identification & Torque Specifications

Common Hardware Types

Hex Head Capscrew

Washer

 

 

Lockwasher

Carriage Bolt

 

 

Hex Nut

Standard Hardware Sizing

When a washer or nut is identified as 1/2” , this is the Nominal size, meaning the inside diameter is 1/2 inch; if a second number is present it represent the threads per inch

When bolt or capscrew is identified as 1/2 - 16 x 2” , this means the Nominal size, or body diameter is 1/2 inch; the second number represents the threads per inch (16 in this example, and the final number is the body length of the bolt or screw (in this example 2 inches long).

The guides and ruler furnished below are designed to help you select the appropriate hardware and tools.

0

 

1/4

Nut, 1/2”

1/2

Inside

Diameter

3/4

 

1

 

1/4

 

1/2

 

3/4

Screw, 1/2 x 2

2

Body

 

1/4

Diameter

 

1/2

Body

Length

3/4

 

3

 

1/4

 

1/2

 

3/4

 

4

 

Torque Specification Chart

FOR STANDARD MACHINE HARDWARE (Tolerance ± 20%)

 

Hardware

 

No

 

 

 

 

 

 

 

 

Marks

 

 

 

 

 

 

 

 

Grade

SAE Grade 2

SAE Grade 5

SAE Grade 8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Size Of

in/lbs

 

 

in/lbs

 

 

in/lbs

 

 

 

 

Hardware

ft/lbs

 

Nm.

ft/lbs

Nm.

ft/lbs

 

Nm.

 

 

 

 

 

 

 

 

 

 

 

 

 

8-32

 

19

 

2.1

30

3.4

 

41

4.6

 

8-36

 

20

 

2.3

31

3.5

 

43

4.9

 

10-24

 

27

 

3.1

43

4.9

 

60

6.8

 

10-32

 

31

 

3.5

49

5.5

 

68

 

7.7

 

1/4-20

 

66

 

7.6

8

10.9

 

12

16.3

 

1/4-28

 

76

 

8.6

10

13.6

 

14

19.0

 

5/16-18

 

 

 

15.0

17

23.1

 

25

34.0

 

 

11

 

 

 

5/16-24

 

12

 

16.3

19

25.8

 

27

34.0

 

3/8-16

 

20

 

27.2

30

40.8

 

45

61.2

 

3/8-24

 

23

 

31.3

35

47.6

 

50

68.0

 

7/16-14

 

30

 

40.8

50

68.0

 

70

95.2

 

7/16-20

 

35

 

47.6

55

74.8

 

80

108.8

 

1/2-13

 

50

 

68.0

75

102.0

 

110

149.6

 

1/2-20

 

55

 

74.8

90

122.4

 

120

163.2

 

9/16-12

 

65

 

88.4

110

149.6

 

150

204.0

 

9/16-18

 

75

 

102.0

120

163.2

 

170

231.2

 

5/8-11

 

90

 

122.4

150

204.0

 

220

299.2

 

5/8-18

 

100

 

136

180

244.8

 

240

326.4

 

3/4-10

 

160

 

217.6

260

353.6

 

386

525.0

 

3/4-16

 

180

 

244.8

300

408.0

 

420

571.2

 

7/8-9

 

140

 

190.4

400

544.0

 

600

816.0

 

7/8-14

 

155

 

210.8

440

598.4

 

660

897.6

 

1-8

 

220

 

299.2

580

788.8

 

900

1,244.0

 

1-12

 

240

 

326.4

640

870.4

 

1,000

1,360.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTES

1.These torque values are to be used for all hardware excluding: locknuts, self-tapping screws, thread forming screws, sheet metal screws and socket head setscrews.

2.Recommended seating torque values for locknuts:

a.for prevailing torque locknuts - use 65% of grade 5 torques.

b.for flange whizlock nuts and screws - use 135% of grade 5 torques.

3.Unless otherwise noted on assembly drawings, all torque values must meet this specification.

Wrench & Fastener Size Guide

 

 

 

7/16

1/2

 

 

3/8

DIA.

1/4

5/16

DIA.

 

1/4” Bolt or Nut

5/16” Bolt or Nut

3/8” Bolt or Nut

7/16” Bolt or Nut

1/2” Bolt or Nut

Wrench—7/16”

Wrench—1/2”

Wrench—9/16”

Wrench (Bolt)—5/8”

Wrench—3/4”

 

 

 

Wrench (Nut)—11/16”

 

Image 26
Contents Rear Tine Tiller N U F a C T U R I N G , I N C Spring Street / PO Box Table of Contents Handlebar Assembly RT42901APlastic Pivot WasherTilt Lever Rubber GrommetHandlebar Assembly Drive Control Lever PushnutReverse Link Gear Shift RODHood, Drag Stake & Bolo Tines RT42902AFootnotes Engine Mounting, Belts & Wheels HL HI IH HhhfSetscrew Weight CastingBushing Bumper GuardShifting Mechanism GM HR PCotter PIN Belt CoverTransmission Housing GL NKeeper SealWheel Transmission Assembly GF HI HS HN LLPSpline HUB-PTO Shift DOGSpacer END CAPTine Transmission Assembly Pinion CastingGasket GearDecals RT42908ADecals Hiller/Furrower Attachment Ref. Info. Only RT42909ABracket Not servicable parts components shown for ref. onlyPart Number Index 920438 928372Page Hardware Identification & Torque Specifications DIA

821RT specifications

The Simplicity 821RT is a cutting-edge riding mower designed for both residential and commercial use, combining advanced technology with user-friendly characteristics. This versatile machine is engineered to deliver an exceptional mowing experience while ensuring reliability and performance.

One of the standout features of the Simplicity 821RT is its powerful 23-horsepower Briggs & Stratton engine. This robust engine provides ample power to handle tough mowing tasks, while the ReadyStart technology eliminates the need for a choke, allowing for easier starts in any weather condition. With its air-cooled design, the engine ensures optimal performance and longevity.

The 821RT features a durable steel frame and a high-performance mower deck that measures 48 inches wide. The deep dome design of the deck enhances grass collection and delivers a superior cut quality. This mower is equipped with the exclusive Simplicity Free Floating Mower Deck system, which ensures that the deck follows the contours of the terrain, providing an even cut every time. Furthermore, the deck height can be easily adjusted, allowing users to customize their mowing experience according to their lawn's specific needs.

Another innovative aspect of the Simplicity 821RT is its Hydro-Gear transmission, which offers effortless control and maneuverability. The automatic transmission allows the operator to shift seamlessly from forward to reverse without the need for clutching, making it easier to navigate around obstacles in tight spaces.

Comfort is a key consideration in the design of the Simplicity 821RT. The mower features an ergonomic seat with ample padding and adjustable armrests, providing comfort during long hours of mowing. The intuitive controls are easily accessible from the driver's seat, ensuring that users can operate the mower without distraction.

Safety is also prioritized in the design of the Simplicity 821RT. The mower comes equipped with a safety ignition switch and an automatic blade brake, which stops the mower blades when the operator leaves the seat. Additionally, the heavy-duty tires provide excellent traction and stability on various terrains.

In conclusion, the Simplicity 821RT is a powerful, user-friendly riding mower that incorporates innovative technologies and essential features for efficient and high-quality lawn care. With its combination of performance, comfort, and safety, it stands out as an exceptional choice for anyone in need of a reliable lawn maintenance solution.