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Shims for Lengthening Screw Shoulders
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When shoulders come up short, use these shims to extend the shoulder length on your screw. Wiggle the shims over the threads and up to the existing shoulder to create the exact shoulder length you need. Use them to create more space for bearings, pulleys, and sprockets, or extend the length of travel along the shoulder.
You can stack multiple shims to achieve the exact shoulder length or space you need.
18-8 Stainless Steel—The choice for wet and outdoor environments, these shims resist rust. However, they’ll corrode or pit when exposed to salt water and chemicals.
Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these shims won't degrade when exposed to harsh weather, salt water, and most chemicals.
Stress-Resistant Spring Steel—These shims are harder and hold their shape better than carbon steel. Use them for high-stress applications, such as leveling heavy machinery. They're best for dry environments since moisture will cause them to rust.
Thk. | Thk. Tolerance | For Screw Size | ID | ID Tolerance | OD | OD Tolerance | Min. Hardness | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
18-8 Stainless Steel | ||||||||||||
For 5/16" Diameter Shoulder | ||||||||||||
| 0.005" | -0.0005" to 0.0005" | 1/4" | 0.234" | 0" to 0.011" | 0.303" | -0.002" to 0.002" | Rockwell B70 | 50 | 90135A433 | 000000 | ||
| 0.016" | -0.002" to 0.002" | 1/4" | 0.234" | 0" to 0.011" | 0.303" | -0.002" to 0.002" | Rockwell B70 | 25 | 90135A445 | 0000 | ||
| 0.03" | -0.003" to 0.003" | 1/4" | 0.234" | 0" to 0.011" | 0.303" | -0.002" to 0.002" | Rockwell B70 | 25 | 90135A457 | 00000 | ||
Highly Corrosion-Resistant 316 Stainless Steel | ||||||||||||
For 5/16" Diameter Shoulder | ||||||||||||
| 0.005" | -0.0005" to 0.0005" | 1/4" | 0.234" | 0" to 0.011" | 0.303" | -0.002" to 0.002" | Rockwell B70 | 10 | 91017A464 | 00000 | ||
| 0.016" | -0.002" to 0.002" | 1/4" | 0.234" | 0" to 0.011" | 0.303" | -0.002" to 0.002" | Rockwell B70 | 10 | 91017A564 | 00000 | ||
| 0.03" | -0.003" to 0.003" | 1/4" | 0.234" | 0" to 0.011" | 0.303" | -0.002" to 0.002" | Rockwell B70 | 10 | 91017A664 | 00000 | ||
Stress-Resistant Spring Steel | ||||||||||||
For 5/16" Diameter Shoulder | ||||||||||||
| 0.005" | -0.0005" to 0.0005" | 1/4" | 0.234" | 0" to 0.005" | 0.308" | -0.005" to 0" | Rockwell C40 | 25 | 91140A233 | 00000 | ||
| 0.015" | -0.00075" to 0.00075" | 1/4" | 0.234" | 0" to 0.005" | 0.308" | -0.005" to 0" | Rockwell C40 | 50 | 91140A245 | 00000 | ||
| 0.032" | -0.0015" to 0.0015" | 1/4" | 0.234" | 0" to 0.005" | 0.308" | -0.005" to 0" | Rockwell C40 | 25 | 91140A257 | 00000 | ||
Press-Fit Drill Bushings
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Also known as jig bushings, these drill bushings fit inside fixture plate holes to precisely guide drill bits, counterbores, reamers, and other cutting tools. They improve accuracy so your drilled holes and cuts are consistent from part to part. Known for their versatility, drill bushings are also used as spacers, shims, and machinery bushings.
Press into place with a manual or hydraulic press. Since these bushings are sized slightly larger than the hole for an extremely tight fit, they’ll stay put permanently. These are ANSI Type P bushings—also known as headless bushings—which means you don’t need to counterbore the hole to mount them flush.
Don't see the size you need? Additional sizes are available.
Tolerance | Each | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
OD | Lg. | For Drill Bit Size | For Drill Bit Size Decimal Equiv. | ID | OD | Lg. | Drill Bushing Type | Material | Hardness | 1-9 | 10-49 | 50-Up | |||
0.234" ID | |||||||||||||||
| 13/32" | 1/4" | A | 0.234" | 0.0001" to 0.0004" | 0.0012" to 0.0016" | -0.01" to 0.01" | P | Steel | Rockwell C61 | 96511A838 | 00000 | 00000 | 00000 | ||
| 13/32" | 3/8" | A | 0.234" | 0.0001" to 0.0004" | 0.0012" to 0.0016" | -0.01" to 0.01" | P | Steel | Rockwell C61 | 96511A840 | 0000 | 0000 | 0000 | ||
| 13/32" | 1/2" | A | 0.234" | 0.0001" to 0.0004" | 0.0012" to 0.0016" | -0.01" to 0.01" | P | Steel | Rockwell C61 | 96511A841 | 0000 | 0000 | 0000 | ||
| 13/32" | 3/4" | A | 0.234" | 0.0001" to 0.0004" | 0.0012" to 0.0016" | -0.01" to 0.01" | P | Steel | Rockwell C61 | 96511A842 | 0000 | 0000 | 0000 | ||
| 1/2" | 3/8" | A | 0.234" | 0.0001" to 0.0004" | 0.0014" to 0.0017" | -0.01" to 0.01" | P | Steel | Rockwell C61 | 96511A847 | 0000 | 0000 | 0000 | ||
| 1/2" | 1/2" | A | 0.234" | 0.0001" to 0.0004" | 0.0014" to 0.0017" | -0.01" to 0.01" | P | Steel | Rockwell C61 | 96511A848 | 0000 | 0000 | 0000 | ||
| 1/2" | 3/4" | A | 0.234" | 0.0001" to 0.0004" | 0.0014" to 0.0017" | -0.01" to 0.01" | P | Steel | Rockwell C61 | 96511A849 | 0000 | 0000 | 0000 | ||
| 1/2" | 1" | A | 0.234" | 0.0001" to 0.0004" | 0.0014" to 0.0017" | -0.01" to 0.01" | P | Steel | Rockwell C61 | 96511A850 | 0000 | 0000 | 0000 | ||
Removable Drill Bushings
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Replace worn bushings and quickly change IDs without needing to repeatedly use a lever press. Instead of pressing bushings in and out of your jig fixture, which can cause damage, these bushings slide in and out of sleeves (sold separately). By swapping in a bushing with a different ID, you can change the size of your bit and still use the same hole in your fixture. All are made to tight dimensional tolerances for consistent, accurate results, even as you change them in and out. They're also known as slip-fixed and renewable bushings.
Choose a sleeve with a length that matches the length of your bushing. To prevent bushings from spinning inside the sleeve as you drill, pair a standard sleeve with a lock screw, or use a locking sleeve. For faster placement in and removal from sleeves, use a handle.
Head | Tolerance | Each | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
OD | Lg. | For Drill Bit Size | For Drill Bit Size Decimal Equiv. | OD | Thk. | Lock Screw/Bushing Ctr.-to-Ctr. | ID | OD | Lg. | Drill Bushing Type | Material | Hardness | 1-5 | 6-11 | 12-Up | |||
0.234" ID | ||||||||||||||||||
| 1/2" | 3/4" | A | 0.234" | 51/64" | 1/4" | 5/8" | 0.0001" to 0.0004" | -0.0002" to 0" | -0.01" to 0.01" | SF | Steel | Rockwell C61 | 8493A545 | 000000 | 00000 | 00000 | ||
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Slotted Drive | Hex Drive |
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For Bushing OD | ID | OD | Lg. | ID Tolerance | For Drill Bushing Type | Material | Hardness | Sleeve ANSI No. | Each | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2" | 1/2" | 3/4" | 5/16" | 0.0002" to 0.0005" | SF | Steel | Rockwell C61 | L-48-5 | 3556N155 | 00000 | |
| 1/2" | 1/2" | 3/4" | 3/8" | 0.0002" to 0.0005" | SF | Steel | Rockwell C61 | L-48-6 | 3556N156 | 0000 | |
| 1/2" | 1/2" | 3/4" | 1/2" | 0.0002" to 0.0005" | SF | Steel | Rockwell C61 | L-48-8 | 3556N157 | 0000 | |
| 1/2" | 1/2" | 3/4" | 3/4" | 0.0002" to 0.0005" | SF | Steel | Rockwell C61 | L-48-12 | 3556N158 | 0000 | |
| 1/2" | 1/2" | 3/4" | 1" | 0.0002" to 0.0005" | SF | Steel | Rockwell C61 | L-48-16 | 3556N159 | 0000 | |
| 1/2" | 1/2" | 3/4" | 1 3/8" | 0.0002" to 0.0005" | SF | Steel | Rockwell C61 | L-48-22 | 3556N161 | 00000 |
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Knurled |
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Smooth |
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Knurled | Smooth | |||||||||||||
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For Bushing OD | ID | OD | Lg. | Head Dia. | Flange Distance | ID Tolerance | For Drill Bushing Type | Material | Hardness | Each | Each | |||
| 1/2" | 1/2" | 3/4" | 47/64" | 13/16" | 1/2" | 0.0002" to 0.0005" | SF | Steel | Rockwell C61 | 31425A125 | 000000 | 31425A22 | 000000 | |
| 1/2" | 1/2" | 3/4" | 63/64" | 13/16" | 1/2" | 0.0002" to 0.0005" | SF | Steel | Rockwell C61 | 31425A126 | 00000 | 31425A113 | 00000 | |
| 1/2" | 1/2" | 3/4" | 1 15/64" | 13/16" | 1/2" | 0.0002" to 0.0005" | SF | Steel | Rockwell C61 | 31425A127 | 00000 | 31425A114 | 00000 | |
