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Machine Key Rounded

Series

Series

Solid Set

Solid (Rigid)

Single Split

Double Split

Flange-Mount Shaft Collars

UCP200 Series

UCF200 Series

UCFL200 Series

UCPA200 SERIES

UCFA200 SERIES

UCFB200 Series

UCST200 SERIES

HCP200 Series

HCFS200 Series

HCFL200 SERIES

SAPP200 SERIES

SBRFB200 Series

SBLF200 Series

TWA/SWA Series

Single Strand

Single Strand Heavy Duty (H)

Double Strand

Triple Strand

Sharp Top Mill Chain

Conveyor Chains

Connecting Links

Offset Links

SER200 Series

UC200 Series

SA200 Series Locking Collar Ball Bearing

SUC200 Series

SB200 Series

HC200 SERIES

CSA200 Series Cylindrical Bearings

1600 Series

203KRR Series

5200 Series

5300 Series

6000 Series

6200 Series

6300 Series

6800 Series

6900 Series

Agricultural Bearings

CYR/CAM FOLLOWER

Odd Ball Bearings

Oil Seals

Linear Ball Bearing

R Series

Roller Chain Sprockets

Idler Sprockets

Gear Spur-External

V Belts

V-Belt Pulleys

Keyed Steel Shafting

Machine Key Rounded

More

Material

Material

Zinc Plated Steel

Ductile Iron

Steel Black Oxide Finish

1018 Cold Drawn Steel

Stainless Steel

Aluminum

Acetal White Nylon Plastic

Steel Unplated

Stainless Steel (316 Alloy)

Zirconia Oxide

Cast Iron

Steel

Cast Iron Housing/Chrome Steel Insert

Chrome Steel

Ceramic

Thermoplastic

More

Chain Size

Chain Size

#25

#35

#40

#41

#50

#50-3

#60

#60-2

#80

#100

#140

#160

More

Tooth

Tooth

80 Tooth

40 Tooth

8 Tooth

9 Tooth

10 Tooth

11 Tooth

12 Tooth

13 Tooth

14 Tooth

15 Tooth

16 Tooth

17 Tooth

18 Tooth

19 Tooth

20 Tooth

21 Tooth

22 Tooth

23 Tooth

24 Tooth

25 Tooth

26 Tooth

28 Tooth

30 Tooth

31 Tooth

32 Tooth

35 Tooth

36 Tooth

48 Tooth

50 Tooth

60 Tooth

64 Tooth

70 Tooth

84 Tooth

More

Bore Size

Bore Size

10

1/8"

5/32"

3/16"

1/4"

5/16"

3/8"

3/8" x 1/4"

7/16"

1/2"

1/2"x 3/8"

9/16"

19/32"

5/8"

0.6280"

5/8" X 1/2"

0.64"

11/16"

3/4"

3/4" X 1/2"

3/4"x5/8"

13/16"

7/8"

7/8" x 5/8"

15/16"

1"

1" x 3/4"

1"x-1/2"

1.05"

1.0850"

1-1/16"

1-1/8"

1-1/8" x 1"

1.1875"

1-3/16"

1-1/4"

1-1/4" x 1"

1-5/16"

1.378"

1-3/8"

1-3/8" x 1"

1-7/16"

1-1/2"

1-1/2" x 1"

1-17/32"

1-9/16"

1-5/8"

1-11/16"

1-3/4"

1-13/16"

1-7/8"

1-15/16"

2"

2.04"

2-1/16"

2-1/8"

2-3/16"

2-1/4"

2-5/16"

2-3/8"

2-7/16"

2-1/2"

2-9/16"

2-5/8"

2-11/16"

2-3/4"

2-7/8"

2-15/16"

3"

3-3/16"

3-1/4"

3-7/16"

3-1/2"

3-3/4"

3-15/16"

4"

4-1/4"

4-1/2"

4-15/16"

5"

5-1/2"

5-15/16"

6"

3mm

4mm

5mm

6mm

7mm

8mm

9mm

10mm

12mm

13mm

14mm

15mm

16mm

17mm

18mm

19mm

19.03 mm

20mm

21mm

22mm

23mm

24mm

25mm

26mm

28mm

30mm

32mm

34mm

35mm

36mm

38mm

40mm

42mm

45mm

48mm

50mm

54mm

55mm

60mm

65mm

70mm

75mm

80mm

90mm

100mm

105mm

120mm

Finished Bore

More

Size

Size

1/8"x1/8"

3/16"x3/16"

1/4"x1/4"

5/16"x5/16"

3/8"X3/8"

1/2"x1/2"

#25

#35

#35-2

#35-3

#40

#40-2

#40-3

#41

#50

#50H

#50-2

#50-3

#60

#60H

#60 Sharp

#60-2

#60-3

#80

#80H

#80-2

#80-3

#80 Sharp

#80-2 Sharp

#80-3 Sharp

#80-4 Sharp

#100

#100H

#100-3

#100 Sharp

#100-2 Sharp

#120

#140

#160

A2050

C2080H-1R

C2060H-D5-1/2

C2060H-1R

More

Length

Length

3/4"

1"

1-1/4"

1-1/2"

1FT

1.5FT

2FT

3FT

5FT

6FT

10FT

50FT

100FT

More

Outer Diameter

Outer Diameter

3/8"

7/16"

1/2"

5/8"

11/16"

3/4"

7/8"

15/16"

29/32"

1"

1-1/8"

1-1/4"

1.313"

1-5/16"

1-3/8"

1.4990"

1-1/2"

1-5/8"

1.529"

1-3/4"

1.7805"

1.85"

1-7/8"

2"

2.04"

2-1/16"

2-1/8"

2-3/16"

2.2795"

2-1/4"

2-3/8"

2-1/2"

2-9/16"

2-5/8"

2.6655"

2-3/4"

2-7/8"

2-53/64"

2.835"

3"

3.073"

3-1/4"

3.347"

3-3/8"

3.543"

3-1/2"

3-5/16"

3.55"

3.6063"

3-3/4"

3-7/8"

3-15/16"

4"

4-1/4"

4-1/2"

4-3/4"

5"

5-1/4"

5-1/2"

5-3/4"

6"

6-1/4"

6-3/8"

6-3/4"

7-1/4"

8mm

10mm

12mm

15mm

16mm

18mm

19mm

20mm

21mm

22mm

24mm

25mm

26mm

28mm

30mm

32mm

34mm

35mm

36mm

37mm

40mm

42mm

44mm

45mm

45.237 mm

47mm

48mm

50mm

52mm

54mm

55mm

56mm

57mm

58mm

60mm

62mm

63mm

65mm

68mm

70mm

72mm

73mm

75mm

78mm

80mm

82mm

85mm

85.75mm

88mm

90mm

93mm

98mm

100mm

101.6mm

103mm

108mm

110mm

120mm

125mm

128.219mm

180mm

190mm

More

Width

Width

31.75mm

5/32"

0.196"

1/4"

9/32"

5/16"

11/32"

.3438"

3/8"

7/16"

.4331"

.472"

1/2"

9/16"

.5906"

.61"

5/8"

11/16"

.70"

3/4"

7/8"

.984"

1.092"

1-1/8"

1-5/16"

1-7/16"

1.6910"

3-7/8"

4mm

5mm

6mm

7mm

8mm

9mm

10mm

11mm

12mm

13mm

14mm

15mm

15.494 mm

16mm

17mm

17.5mm

18mm

19mm

20.6mm

21mm

23mm

23.8mm

24mm

25mm

25.4mm

27mm

30.2mm

33.34mm

36mm

36.5mm

36.52mm

37.7mm

43mm

46mm

49.2mm

More

Dura-Prime Classical

Dura-Prime Classical

A/4L ½” x 5/16”

B/5L 5/8” x 7/16”

Belt Length

Belt Length

16"

16.5"

17"

17.5"

18"

19"

19.5"

20"

21"

21.5"

22"

23"

23.5"

24"

25"

25.5"

27.5"

26"

27"

28"

28.5"

29"

29.5"

30"

30.5"

31"

31.5"

32"

32.5"

33"

33.5"

34"

34.5"

35"

35.5"

36"

36.5"

37"

38"

38.5"

39"

40"

40.5"

41"

41.5"

42"

42.5"

43"

43.5"

44"

45"

45.5"

46"

47"

47.5"

48"

48.5"

49"

50"

50.5"

51"

51.5"

52"

52.5"

53"

53.5"

54"

55"

55.5"

56"

57"

57.5"

58"

59"

60"

61"

62"

63"

63.5"

64"

64.5"

65"

66"

67"

68"

69"

70"

71"

72"

73"

74"

75"

76"

77"

78"

79"

80"

81"

82"

83"

84"

85"

86"

87"

88"

89"

90"

91"

92"

93"

94"

95"

96"

97"

98"

99"

100"

101"

102"

103"

104"

105"

106"

107"

108"

109"

110"

111"

112"

113"

114"

115"

116"

117"

118"

119"

120"

121"

122"

123"

124"

125"

126"

127"

128"

129"

130"

131"

132"

133"

134"

135"

136'

137"

138"

139"

140"

141"

142"

143"

144"

145"

146"

147"

148"

149"

150"

151"

152"

153"

154"

155"

156"

157"

158"

159"

160"

161"

163"

164"

165"

166"

167"

168"

169"

174"

175"

177"

178"

180"

182"

190"

198"

199"

202"

203"

204"

212"

214"

219"

222"

223"

232"

239"

242"

258"

295"

279"

300"

312"

More

Belt Width

Belt Width

1/2"

5/8"

Category

Shaft Collars
Couplings
Pillow Block Bearings
Insert Bearings
Radial Ball Bearings
Roller Chains
Sprockets and Idler Sprockets
V-Belts
Keyed Shafts & Keyways
All Poducts

Rounded Machine Keys

Machine keys are metal blocks and wedges that insert between a drive shaft and a driven component to transfer the rotational force needed to spin the drive component. They fit into precut slots in the shaft called key seats and grooves in the hub called keyways.

Filter Products

Rounded Machine Keys

Machine Key Rounded, Steel, 1/8″ x 1/8″, 3/4″ Long-Pack of 5

Sold in packs of:
1 PK,2 PK,4 PK

$11.60 – $41.75

Select options This product has multiple variants. The options may be chosen on the product page

Rounded Machine Keys

Machine Key Rounded, Steel, 1/8″ x 1/8″, 1″ Long-Pack of 5

$12.00

Add to cart

Rounded Machine Keys

Machine Key Rounded, Steel, 3/16″ x 3/16″, 3/4″ Long-Pack of 5

$11.50

Add to cart

Rounded Machine Keys

Machine Key Rounded, Steel, 3/16″ x 3/16″, 1″ Long-Pack of 5

$12.00

Add to cart

Rounded Machine Keys

Machine Key Rounded, Steel, 3/16″ x 3/16″, 1-1/4″ Long-Pack of 5

$12.00

Add to cart

Rounded Machine Keys

Machine Key Rounded, Steel, 1/4″ x 1/4″x 3/4″ Long-Pack of 5

$11.75

Add to cart

Rounded Machine Keys

Machine Key Rounded, Steel, 1/4″ x 1/4″, 1-1/4″ Long-Pack of 5

$12.75

Add to cart

Rounded Machine Keys

Machine Key Rounded, Steel, 1/4″ x 1/4″, 1-1/2″ Long-Pack of 5

Sold in packs of:
1 PK,2 PK,4 PK

$12.75 – $46.00

Select options This product has multiple variants. The options may be chosen on the product page

Rounded Machine Keys

Machine Key Rounded, Steel, 5/16″ x 5/16″, 1-1/4″ Long-Pack of 5

Sold in packs of:
1 PK,2 PK,4 PK

$12.50 – $45.25

Select options This product has multiple variants. The options may be chosen on the product page

Rounded Machine Keys

Machine Key Rounded, Steel, 5/16″ x 5/16″, 1-1/2″ Long-Pack of 5

$12.50

Add to cart

Rounded Machine Keys

Machine Key Rounded, Steel, 3/8″ x 3/8″, 1-1/4″ Long-Pack of 5

$12.50

Add to cart

Rounded Machine Keys

Machine Key Rounded, Steel, 3/8″ x 3/8″, 1-1/2″ Long-Pack of 5

$12.50

Add to cart

Rounded Machine Keys

Machine Key Rounded, Steel, 1/2″ x 1/2″, 1-1/2″ Long-Pack of 5

$13.50

Add to cart

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FAQ'S About This Product.

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Category

Shaft Collars
Couplings
Pillow Block Bearings
Insert Bearings
Radial Ball Bearings
Roller Chains
Sprockets and Idler Sprockets
V-Belts
Keyed Shafts & Keyways
All Products

Series

Series

Solid Set

Solid (Rigid)

Single Split

Double Split

Flange-Mount Shaft Collars

UCP200 Series

UCF200 Series

UCFL200 Series

UCPA200 SERIES

UCFA200 SERIES

UCFB200 Series

UCST200 SERIES

HCP200 Series

HCFS200 Series

HCFL200 SERIES

SAPP200 SERIES

SBRFB200 Series

SBLF200 Series

TWA/SWA Series

Single Strand

Single Strand Heavy Duty (H)

Double Strand

Triple Strand

Sharp Top Mill Chain

Conveyor Chains

Connecting Links

Offset Links

SER200 Series

UC200 Series

SA200 Series Locking Collar Ball Bearing

SUC200 Series

SB200 Series

HC200 SERIES

CSA200 Series Cylindrical Bearings

1600 Series

203KRR Series

5200 Series

5300 Series

6000 Series

6200 Series

6300 Series

6800 Series

6900 Series

Agricultural Bearings

CYR/CAM FOLLOWER

Odd Ball Bearings

Oil Seals

Linear Ball Bearing

R Series

Roller Chain Sprockets

Idler Sprockets

Gear Spur-External

V Belts

V-Belt Pulleys

Keyed Steel Shafting

Machine Key Rounded

More

Material

Material

Zinc Plated Steel

Ductile Iron

Steel Black Oxide Finish

1018 Cold Drawn Steel

Stainless Steel

Aluminum

Acetal White Nylon Plastic

Steel Unplated

Stainless Steel (316 Alloy)

Zirconia Oxide

Cast Iron

Steel

Cast Iron Housing/Chrome Steel Insert

Chrome Steel

Ceramic

Thermoplastic

More

Chain Size

Chain Size

#25

#35

#40

#41

#50

#50-3

#60

#60-2

#80

#100

#140

#160

More

Tooth

Tooth

80 Tooth

40 Tooth

8 Tooth

9 Tooth

10 Tooth

11 Tooth

12 Tooth

13 Tooth

14 Tooth

15 Tooth

16 Tooth

17 Tooth

18 Tooth

19 Tooth

20 Tooth

21 Tooth

22 Tooth

23 Tooth

24 Tooth

25 Tooth

26 Tooth

28 Tooth

30 Tooth

31 Tooth

32 Tooth

35 Tooth

36 Tooth

48 Tooth

50 Tooth

60 Tooth

64 Tooth

70 Tooth

84 Tooth

More

Bore Size

Bore Size

10

1/8"

5/32"

3/16"

1/4"

5/16"

3/8"

3/8" x 1/4"

7/16"

1/2"

1/2"x 3/8"

9/16"

19/32"

5/8"

0.6280"

5/8" X 1/2"

0.64"

11/16"

3/4"

3/4" X 1/2"

3/4"x5/8"

13/16"

7/8"

7/8" x 5/8"

15/16"

1"

1" x 3/4"

1"x-1/2"

1.05"

1.0850"

1-1/16"

1-1/8"

1-1/8" x 1"

1.1875"

1-3/16"

1-1/4"

1-1/4" x 1"

1-5/16"

1.378"

1-3/8"

1-3/8" x 1"

1-7/16"

1-1/2"

1-1/2" x 1"

1-17/32"

1-9/16"

1-5/8"

1-11/16"

1-3/4"

1-13/16"

1-7/8"

1-15/16"

2"

2.04"

2-1/16"

2-1/8"

2-3/16"

2-1/4"

2-5/16"

2-3/8"

2-7/16"

2-1/2"

2-9/16"

2-5/8"

2-11/16"

2-3/4"

2-7/8"

2-15/16"

3"

3-3/16"

3-1/4"

3-7/16"

3-1/2"

3-3/4"

3-15/16"

4"

4-1/4"

4-1/2"

4-15/16"

5"

5-1/2"

5-15/16"

6"

3mm

4mm

5mm

6mm

7mm

8mm

9mm

10mm

12mm

13mm

14mm

15mm

16mm

17mm

18mm

19mm

19.03 mm

20mm

21mm

22mm

23mm

24mm

25mm

26mm

28mm

30mm

32mm

34mm

35mm

36mm

38mm

40mm

42mm

45mm

48mm

50mm

54mm

55mm

60mm

65mm

70mm

75mm

80mm

90mm

100mm

105mm

120mm

Finished Bore

More

Size

Size

1/8"x1/8"

3/16"x3/16"

1/4"x1/4"

5/16"x5/16"

3/8"X3/8"

1/2"x1/2"

#25

#35

#35-2

#35-3

#40

#40-2

#40-3

#41

#50

#50H

#50-2

#50-3

#60

#60H

#60 Sharp

#60-2

#60-3

#80

#80H

#80-2

#80-3

#80 Sharp

#80-2 Sharp

#80-3 Sharp

#80-4 Sharp

#100

#100H

#100-3

#100 Sharp

#100-2 Sharp

#120

#140

#160

A2050

C2080H-1R

C2060H-D5-1/2

C2060H-1R

More

Length

Length

3/4"

1"

1-1/4"

1-1/2"

1FT

1.5FT

2FT

3FT

5FT

6FT

10FT

50FT

100FT

More

Outer Diameter

Outer Diameter

3/8"

7/16"

1/2"

5/8"

11/16"

3/4"

7/8"

15/16"

29/32"

1"

1-1/8"

1-1/4"

1.313"

1-5/16"

1-3/8"

1.4990"

1-1/2"

1-5/8"

1.529"

1-3/4"

1.7805"

1.85"

1-7/8"

2"

2.04"

2-1/16"

2-1/8"

2-3/16"

2.2795"

2-1/4"

2-3/8"

2-1/2"

2-9/16"

2-5/8"

2.6655"

2-3/4"

2-7/8"

2-53/64"

2.835"

3"

3.073"

3-1/4"

3.347"

3-3/8"

3.543"

3-1/2"

3-5/16"

3.55"

3.6063"

3-3/4"

3-7/8"

3-15/16"

4"

4-1/4"

4-1/2"

4-3/4"

5"

5-1/4"

5-1/2"

5-3/4"

6"

6-1/4"

6-3/8"

6-3/4"

7-1/4"

8mm

10mm

12mm

15mm

16mm

18mm

19mm

20mm

21mm

22mm

24mm

25mm

26mm

28mm

30mm

32mm

34mm

35mm

36mm

37mm

40mm

42mm

44mm

45mm

45.237 mm

47mm

48mm

50mm

52mm

54mm

55mm

56mm

57mm

58mm

60mm

62mm

63mm

65mm

68mm

70mm

72mm

73mm

75mm

78mm

80mm

82mm

85mm

85.75mm

88mm

90mm

93mm

98mm

100mm

101.6mm

103mm

108mm

110mm

120mm

125mm

128.219mm

180mm

190mm

More

Width

Width

31.75mm

5/32"

0.196"

1/4"

9/32"

5/16"

11/32"

.3438"

3/8"

7/16"

.4331"

.472"

1/2"

9/16"

.5906"

.61"

5/8"

11/16"

.70"

3/4"

7/8"

.984"

1.092"

1-1/8"

1-5/16"

1-7/16"

1.6910"

3-7/8"

4mm

5mm

6mm

7mm

8mm

9mm

10mm

11mm

12mm

13mm

14mm

15mm

15.494 mm

16mm

17mm

17.5mm

18mm

19mm

20.6mm

21mm

23mm

23.8mm

24mm

25mm

25.4mm

27mm

30.2mm

33.34mm

36mm

36.5mm

36.52mm

37.7mm

43mm

46mm

49.2mm

More

Dura-Prime Classical

Dura-Prime Classical

A/4L ½” x 5/16”

B/5L 5/8” x 7/16”

Belt Length

Belt Length

16"

16.5"

17"

17.5"

18"

19"

19.5"

20"

21"

21.5"

22"

23"

23.5"

24"

25"

25.5"

27.5"

26"

27"

28"

28.5"

29"

29.5"

30"

30.5"

31"

31.5"

32"

32.5"

33"

33.5"

34"

34.5"

35"

35.5"

36"

36.5"

37"

38"

38.5"

39"

40"

40.5"

41"

41.5"

42"

42.5"

43"

43.5"

44"

45"

45.5"

46"

47"

47.5"

48"

48.5"

49"

50"

50.5"

51"

51.5"

52"

52.5"

53"

53.5"

54"

55"

55.5"

56"

57"

57.5"

58"

59"

60"

61"

62"

63"

63.5"

64"

64.5"

65"

66"

67"

68"

69"

70"

71"

72"

73"

74"

75"

76"

77"

78"

79"

80"

81"

82"

83"

84"

85"

86"

87"

88"

89"

90"

91"

92"

93"

94"

95"

96"

97"

98"

99"

100"

101"

102"

103"

104"

105"

106"

107"

108"

109"

110"

111"

112"

113"

114"

115"

116"

117"

118"

119"

120"

121"

122"

123"

124"

125"

126"

127"

128"

129"

130"

131"

132"

133"

134"

135"

136'

137"

138"

139"

140"

141"

142"

143"

144"

145"

146"

147"

148"

149"

150"

151"

152"

153"

154"

155"

156"

157"

158"

159"

160"

161"

163"

164"

165"

166"

167"

168"

169"

174"

175"

177"

178"

180"

182"

190"

198"

199"

202"

203"

204"

212"

214"

219"

222"

223"

232"

239"

242"

258"

295"

279"

300"

312"

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Belt Width

Belt Width

1/2"

5/8"