Technical Reference

Part Numbering System

Understand how every Gamet bearing part number is constructed — from the core dimensions to the suffix codes for type, spacer variants, and preload.

Interactive Reference

Gamet Part Numbering

A complete breakdown of Gamet's official bearing designation system.

Prefix
Q
Q = Special / Custom Variant
(Optional)
·
Cone Series
140
Specific cone design (Angle & Width) within bore family.
Cone Bore Size
085
Nominal Bore (d)
Example: 85mm
/
Cup Outer Dia & Series
140140
Matching cup for the cone. Indicates OD (D) = 140mm & cup series.
Type Suffix
HE
Plain: (none)
C: Flanged
G / H: Double Row
P: Pre-loaded
E: Spacer Variant
Preload
+10
Spacer axial preload setting in μm.
(Only on GE / HE types)

Anatomy of a Gamet Part Number

A complete Gamet bearing designation follows the format below. Each part carries specific dimensional or configuration information.

Q Optional Prefix
(Q = Special / Custom)
·
160098 Cone Number
(Series × Bore × Width)
/
160160 Cup Number
(Mating outer race)
H Type Suffix
(H = Double Row Flanged)
Full Example: 160098X / 160160H 160098X = Cone (160 series, 98.425mm bore, Inch Variation)
160160 = Cup (160mm OD)
H = Double row flanged cup

Type Suffix Reference

Suffixes are appended to the Cup number to specify the bearing configuration.

No suffix

Plain Cup (Standard)

The basic single row tapered roller bearing. Plain outer ring with no flange. The most common Gamet configuration, suitable for light to medium loads.

C

C Type — Flanged Cup

A single row bearing with a flanged (C-type) outer ring cup. The flange simplifies housing preparation by enabling through-boring, improving machining accuracy and alignment.

G

G Type — Double Row Plain

Double row plain cup. Uses two cone assemblies on one cup to provide nearly twice the load capacity of a single row, without adding a flange. Equivalent spacer variant: GE.

H

H Type — Double Row Flanged

Double row bearing with a flanged cup. Provides the high load capacity of the G type combined with a rigidly located outer flange for through-bored housings. Equivalent spacer variant: HE.

P

P Type — Spring Pre-loaded

Single row bearing with an extended outer ring and housing load springs. Designed to slide within the housing, providing constant preload regardless of thermal expansion. Often paired with a G or H type at the other end of the spindle.

X

X Suffix — Metric Conversion

Appended to a part number (e.g. 80066X) to indicate the bearing is a metric dimensioned version of an originally imperial design. Core dimensions are standardised to mm.

Q / QK (prefix)

Q / QK Prefix — Custom Assembly

A special prefix indicating a custom or specialized bearing variant. This denotes non-standard specifications (e.g., modified cage, special material, unique tolerances) tailored for a particular manufacturing application.

AR

AR — Anti-Rotation

Anti-rotation feature. A tab or pin prevents the outer ring from rotating within the housing. Used in applications where the housing bore cannot be precision-ground to a tight enough tolerance to prevent cup rotation.

E

The "E" Suffix — Spacer Variants (GE / HE)

Same envelope dimensions as G/H — only the spacer and preload change

When a bearing part number contains GE or HE (instead of G or H), it indicates that a built-in spacer is incorporated into the bearing assembly. The outer envelope dimensions — bore (d), outer diameter (D), and width (T) — remain exactly the same as the non-E variant. This means a GE-type bearing fits identically in the same housing as a G-type bearing.

The numeral after the E represents the axial preload in micrometres (μm). The sign indicates the direction:

Suffix Example Meaning Typical Use
HE0 H type with built-in spacer, 0 μm preload (zero preload / just touching) General purpose spindle work
HE+10 H type with spacer, +10 μm positive (compressive) preload Light grinding spindles, improved stiffness
HE+20 / HE+30 Increasing positive preload — tighter axial setting Heavy duty grinding / turning at lower speeds
HE-10 Negative preload — a small clearance is built in High-speed operation to reduce thermal load
GE0 G type (double plain row) with spacer, zero preload Tailstock spindles, moderate load
GE+20 G type with spacer, +20 μm positive preload Higher stiffness grinding tailstocks
Key Rule: When searching for dimensions of an HE or GE bearing, use the matching H or G catalog entry — all physical dimensions are identical. The only difference is the internal spacer length and the pre-set preload value.