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KHK GEARS Hubless Spur Gear: Module m 2, 28 Teeth, 15 mm Bore Dia, Black Oxide Coated Carbon Steel - Hubless Metric Spur Gears
KHK GEARSHubless Metric Spur Gears

KHK GEARS Hubless Spur Gear: Module m 2, 28 Teeth, 15 mm Bore Dia, Black Oxide Coated Carbon Steel

The KHK GEARS Hubless Spur Gear (Module m 2, MPN SSA2-28) is a metric, black-oxide-coated carbon steel spur gear with 28 teeth, a 15 mm plain bore, and no hub. It is precision-graded JIS N8 (JIS B1702-1:1998) with an…

SKU 3G-OTH-724369

Brand
KHK GEARS
Item
Hubless Spur Gear: Module m 2, 28 Teeth, 15 mm Bore Dia, Black Oxide Coated Carbon Steel
Category
Hubless Metric Spur Gears
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Technical Specifications

KHK GEARS
Manufacturer Part Number
SSA2-28
Type
Black Oxide Coated Carbon Steel, Plain Bore
Material
Carbon Steel
Teeth
28
Finish
Black Oxide
Bore Dia
15 mm
Hub Type
No Hub
Gear Shape
S5
Material Grade
S45C
Precision Class
JIS N8 (JIS B1702-1:1998)
System of Measurement
Metric
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KHK GEARS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The KHK GEARS Hubless Spur Gear (Module m 2, MPN SSA2-28) is a metric, black-oxide-coated carbon steel spur gear with 28 teeth, a 15 mm plain bore, and no hub. It is precision-graded JIS N8 (JIS B1702-1:1998) with an S5 gear shape, made from S45C material grade. 3G Electric sources this genuine industrial gear across 14 departments — and far more — with specialist depth in combustion, pumps and controls as an authorised distributor.

Frequently Asked Questions

What is a KHK hubless spur gear used for?

A KHK hubless spur gear transmits motion and torque between parallel shafts in industrial machinery. It is commonly used in conveyors, packaging equipment, and machine tools where a compact, lightweight gear without a protruding hub is required for space-constrained assemblies.

What are the specifications of the KHK SSA2-28 hubless spur gear?

The KHK SSA2-28 is a metric hubless spur gear with module m 2, 28 teeth, a 15 mm plain bore, and black oxide coated carbon steel (S45C). It has JIS N8 precision (JIS B1702-1:1998) and an S5 gear shape. No hub design simplifies mounting on shafts.

Where to buy KHK hubless spur gears worldwide?

3G Electric supplies genuine KHK hubless spur gears worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source across 14 departments — including combustion, pumps, and controls — to meet your gear and broader equipment needs.

How to install a hubless spur gear with a plain bore?

To install a hubless spur gear with a plain bore, align the gear on the shaft at the desired position and secure it using set screws or a key (if keyway is present). Ensure the shaft and bore are clean. Use a shaft collar on each side to prevent axial movement during operation.

KHK GEARS Products

3G Electric supplies KHK GEARS hubless metric spur gears. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Hubless Spur Gear: Module m 2.5, 48 Teeth, 15 mm Bore Dia, Nylon, 20° Pressure Angle, Plain Bore (MPN PSA2.5-48). Key specifications — Material Grade: MC901; System of Measurement: Metric; Material: Nylon; Hub Type: No Hub; Precision Class: JIS N9 (JIS B1702-1:1998); Gear Shape: S5.
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Hubless Spur Gear: Module m 2.5, 48 Teeth, 15 mm Bore Dia, Nylon, 20° Pressure Angle, Plain Bore (MPN PSA2.5-48). Key specifications — Material Grade: MC901; System of Measurement: Metric; Material: Nylon; Hub Type: No Hub; Precision Class: JIS N9 (JIS B1702-1:1998); Gear Shape: S5.
Hubless Spur Gear: Module m 2, 65 Teeth, 15 mm Bore Dia, Nylon, 20° Pressure Angle, Plain Bore (MPN PSA2-65). Key specifications — Material Grade: MC901; System of Measurement: Metric; Material: Nylon; Hub Type: No Hub; Precision Class: JIS N9 (JIS B1702-1:1998); Gear Shape: S5.
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Hubless Spur Gear: Module m 2, 65 Teeth, 15 mm Bore Dia, Nylon, 20° Pressure Angle, Plain Bore (MPN PSA2-65). Key specifications — Material Grade: MC901; System of Measurement: Metric; Material: Nylon; Hub Type: No Hub; Precision Class: JIS N9 (JIS B1702-1:1998); Gear Shape: S5.
Hubless Spur Gear: Module m 2, 45 Teeth, 18 mm Bore Dia, Black Oxide Coated Carbon Steel, Plain Bore (MPN SSA2-45). Key specifications — Material Grade: S45C; Finish: Black Oxide; System of Measurement: Metric; Material: Carbon Steel; Hub Type: No Hub; Precision Class: JIS N8 (JIS B1702-1:1998); Gear Shape: S5.
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Hubless Spur Gear: Module m 2, 45 Teeth, 18 mm Bore Dia, Black Oxide Coated Carbon Steel, Plain Bore (MPN SSA2-45). Key specifications — Material Grade: S45C; Finish: Black Oxide; System of Measurement: Metric; Material: Carbon Steel; Hub Type: No Hub; Precision Class: JIS N8 (JIS B1702-1:1998); Gear Shape: S5.
Hubless Spur Gear: Module m 2, 20 Teeth, 12 mm Bore Dia, Black Oxide Coated Carbon Steel, Plain Bore (MPN SSA2-20). Key specifications — Material Grade: S45C; Finish: Black Oxide; System of Measurement: Metric; Material: Carbon Steel; Hub Type: No Hub; Precision Class: JIS N8 (JIS B1702-1:1998); Gear Shape: S5.
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Hubless Spur Gear: Module m 2, 20 Teeth, 12 mm Bore Dia, Black Oxide Coated Carbon Steel, Plain Bore (MPN SSA2-20). Key specifications — Material Grade: S45C; Finish: Black Oxide; System of Measurement: Metric; Material: Carbon Steel; Hub Type: No Hub; Precision Class: JIS N8 (JIS B1702-1:1998); Gear Shape: S5.
Hubless Spur Gear: Module m 1, 48 Teeth, 8 mm Bore Dia, Black Oxide Coated Carbon Steel, Plain Bore (MPN SSA1-48). Key specifications — Material Grade: S45C; Finish: Black Oxide; System of Measurement: Metric; Material: Carbon Steel; Hub Type: No Hub; Precision Class: JIS N8 (JIS B1702-1:1998); Gear Shape: S5.
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Hubless Spur Gear: Module m 2, 25 Teeth, 12 mm Bore Dia, Black Oxide Coated Carbon Steel, Plain Bore (MPN SSA2-25). Key specifications — Material Grade: S45C; Finish: Black Oxide; System of Measurement: Metric; Material: Carbon Steel; Hub Type: No Hub; Precision Class: JIS N8 (JIS B1702-1:1998); Gear Shape: S5.
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Hubless Spur Gear: Module m 2, 25 Teeth, 12 mm Bore Dia, Black Oxide Coated Carbon Steel, Plain Bore (MPN SSA2-25). Key specifications — Material Grade: S45C; Finish: Black Oxide; System of Measurement: Metric; Material: Carbon Steel; Hub Type: No Hub; Precision Class: JIS N8 (JIS B1702-1:1998); Gear Shape: S5.
Hubless Spur Gear: Module m 1, 70 Teeth, 10 mm Bore Dia, Black Oxide Coated Carbon Steel, Plain Bore (MPN SSA1-70). Key specifications — Material Grade: S45C; Finish: Black Oxide; System of Measurement: Metric; Material: Carbon Steel; Hub Type: No Hub; Precision Class: JIS N8 (JIS B1702-1:1998); Gear Shape: S5.
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Hubless Spur Gear: Module m 2, 60 Teeth, 15 mm Bore Dia, Stainless Steel, 20° Pressure Angle (MPN SUSA2-60). Key specifications — Material Grade: SUS303; System of Measurement: Metric; Material: Stainless Steel; Hub Type: No Hub; Precision Class: JIS N8 (JIS B1702-1:1998); Gear Shape: S5.
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