Idler Wheel Rebuilding

Rek-O-Kut Idler Wheel Mounted Next To Motor Spindle
Rek-O-Kut Idler Wheel Mounted Next To Motor Spindle
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Many older turntables have platter drive systems with a rubber-rimmed idler wheel in between the drive motor and the platter. These are often also called idler pucks, drive disks or idler disks. Over time, the rubber material will harden and shrink, and lose its elasticity and friction.

Single Disk Idler Wheel With Flat Spots
Single Disk Idler Wheel With Flat Spots
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Wheels left in the same position for an extended amount of time will develop a flat spot. Turntables with worn idler wheels will display various symptoms: slow platter speed, unstable platter speed after a few minutes of play (and heat buildup), and motor or drive noise feedback in the sound signal. All of these problems can be alleviated or reduced by having the original idler wheel rebuilt.

Double Disk Idler Wheel
Double Disk Idler Wheel
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Double Disk Idler Wheel
Double Disk Idler Wheel
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The cost of Idler wheel rebuilding varies with the configuration of the wheel and the extent of service required. Most idler wheels are single-disk units, with a bronze hub, metal disk and rubber outer rim. Double-Diameter Idler Wheels may have two distinct disks on a single hub, or they may be a thicker puck with a stepped cut in the outer rim.

Single Disk Idler Wheel
Single Disk Idler Wheel
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Single Disk Idler Wheel
Single Disk Idler Wheel
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There are also wheels used in the operation of fully automatic turntables or those with auto-return tonearms. These wheels may have a notch at one point in the rim, or a narrow shaft, parallel to the hub axis, sticking out of the disk surface. As long as they have only one effective rim surface, they are billed the same as a Single-Disk Idler Wheel.

Idler Hub Held In Place By E-Clip Seated In Groove
Idler Hub Held In Place By E-Clip Seated In Groove
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Removing an idler wheel is usually simple; they are held in place on the shaft with an e-clip, which can be removed by pushing it to the side with a flat-bladed screwdriver. While the idler wheel is removed, clean off the spindle shaft and lubricate it with a heavy grease; my favorite is an automotive engine fastener thread lubricant called MolyLube, after its main ingredient, Molybdenum Disulfide. Re-install the wheel with fresh grease on the shaft and inside the hub bushing, then remove it and clean off any excess grease before final installation.

Gates Double Disk Idler Wheel
Gates Double Disk Idler Wheel
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Check your original wheel as you remove it, to see if there is any play between the bronze hub bushing and the center shaft. If there is, we can also re-machine the hub with new bronze material to restore original fit. However we will need an accurate measurement of the center shaft’s diameter, preferably taken with a micrometer, or with a dial caliper if a micrometer is unavailable. The measuring device should have an accuracy of +/- 0.001 inches, or 0.01 mm. The idler wheel’s hub bushing is made of bronze and the center shaft is likely made of steel, so any wear that took place during the turntable’s prior life will have occurred on the softer bronze surface and not on the harder surface of the steel center shaft.
If your original idler wheel is missing, we can also fabricate a brand new one for you. Naturally, precise measurements are essential. We’ll need to know the diameter of the spindle shaft, the length of the shaft from its base to the clip which holds the wheel in place (to determine the thickness of the hub of the new wheel), and the radii from the center of the spindle shaft to the platter flange and the motor spindle, in both the sprung and un-sprung positions.


Single Disk Idler Wheel Rebuilding Service $40.00

Send in your original idler wheel for service. Rubber Rim is replaced with new material and re-shaped. Does not include bronze hub re-machining.

Single Disk Idler Wheel
Single Disk Idler Wheel
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Single Disk Idler Wheel Rebuilding Service $40.00


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Double Disk Idler Wheel Rebuilding Service $55.00

Send in your original idler wheel for service. Rubber Rim is replaced with new material and re-shaped. Does not include bronze hub re-machining.

Double Disk Idler Wheel
Double Disk Idler Wheel
Click On Image For Larger Version

Double Disk Idler Wheel Rebuilding Service $55.00


options




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