Grundig MCF tape transport gears

Pinion and idler gear that act in tape transport in Grundig MCF 100 and MCF 200 cassette players. Material used for original gears become fragile during time and gears often crack. Tape is not transported then.

Grundig MCF 100/200 gears (replaced)

Replacement gears are made using thermoplastic polyuretane (high precision 3D print) that is slightly flexible as the original material and durable.

The gears were tested for smooth operation.

How to replace the gears:

The part is compatible with following devices:
Grundig MCF 100, Grundig MCF 200

It might work also with other Grundig cassette players – just check your service manual.

Available for purchase – go to shop.

Sony CD Player 4-968-865-01 gear C

The gear is part of CD loader assembly in Sony CDP-X CD players.

CD Mechanism Type: CDM32EB-12C, CDM32EN-12C, CDM32HB-12H, CDM32HN-12H and compatible
Base Unit Type: BU-12C, BU-12H and compatible
Optical Pick-up Type: KSS-273 (KSS-273A, KSS-273B/J1N)

Sony CD Player 4-968-866-01 replacement gear

Faulty gear can be replaced with 3D printed one. Replacement gear was fully tested for correct operation.

original 4-968-865-01 gear cracked

Gear position in the schematic:


Gear is compatible with following devices:
CDP-XA7, CDP-XA7ES, CDP-XA555ES, CDP-XA50ES, CDP-X5000.
However, it might work also with other devices – just check your service manual.

Available for purchase in e-shop.

FM01 79070421 Motor ass’y feed gear

The gear is part of DVD drive feed motor assembly. It is attached to feed motor (FM01 79070421) shaft in Onkyo, Integra, Toshiba and other DVD players. The gear can tend to crack during the time and DVD drive does not work correctly then.

Replacement part was created using a semi-professional 3D printer using durable Nylon material. The gear was tested for correct operation.

You can find the gear here in schematics:

the gear in assembly


Gear is compatible with following DVD Players:
Onkyo DV-S535, Onkyo DR-90, Onkyo DV-C600, Onkyo DV-S525, Integra DPS5, Toshiba SD-5109, Toshiba SD-2300.
However, it might work also with other devices – just check your service manual.

The gear is available in e-shop.
(gear only, without motor)

X33635011

3D Lab CD12 Loading Gear

The gear is part of CD loader assembly in high-end CD player 3D Lab CD12. It uses Sony CD Drive (KSM2101ADM) so it can be compatible with other CD players too.

Faulty gear can be replaced with 3D printed one. Replacement gear was fully tested for correct operation.


Gear is compatible with 3D Lab CD12 Player.
However, it might work also with other devices based on Sony CD drive – just check your service manual.

Available for purchase in e-shop.

Philips 70FC450 (S.E.3) Idler Gear

Idler gear is part of cassette mechanism “S.E.3/5556” in Philips 70FC450 tape recorder.

Philips S.E.3 idler gear (back and front side)

Faulty gear can be replaced with 3D printed one. Replacement gear was fully tested for correct operation.


Gear is compatible with Philips 70FC450.
However, it might work also with other devices – just check your service manual.

Available for purchase in e-shop.

JVC 185505303ZT Reel Motor Assy Gear

The gear is part of JVC 185505303ZT Reel Motor assembly. It is attached to reel motor shaft. The gear can tend to crack during the time and tape drive can become more noisy or does not work correctly.

Replacement part was created using a semi-professional 3D printer using durable Nylon material. You can find the gear here in schematics:

The gear in drive schematic


Gear is compatible with following JVC devices:
TD-X202.
However, it might work also with other devices – just check your service manual.

The gear is available in e-shop

X33635011

Sony CD Changer 4-957-284-01 Gear

The gear was used in Sony CD changers produced in the mid to late 1990s. It is a part of the CD tray and is responsible for the CD tray rotating.

Faulty gear can be replaced with 3D printed one.

Video showing replacement gear in operation.


Gear is compatible with following devices:
CDP-C23, CDP-C235, CDP-C245, CDP-C265, CDP-C345, CDP-C435, CDP-C445, CDP-C545, CDP-C661, CDP-C745, CDP-CA9ES, CDP-CE335, CDP-CE415, CDP-C250Z, CDP-CA8ES.
However, it might work also with other devices – just check your service manual.

Available for purchase in e-shop.

Sony X-3356-638-1 (Reel R) Assy Gear

Gear attached to the motor – part of Sony X-3356-638-1 Motor (Reel R) Assembly. Gear is also compatible with Sony X-3371-429-1 that is actualy a substitute part.

Replacement part was created using a semi-professional 3D printer. Slighty flexible material guarantees silent operation. The part was fully tested.

X-3356-638-1 Motor (Reel R) Assy position in drive

The part is compatible with following devices:
TCKA2E, TCKA2ES, TCKA2ESU, TCK620, TCK850, TCK850ES, TCRX79ES, TCWR901ES, TCWR99ES.

It also might be part of other device – just check corresponding service manual.

Available in e-shop.

ALPS ASD1017 Motorised Input Selector Gears

Motorised input rotary selectors ALPS ASD1017 / Yamaha VT148400 were used in several Pioneer, Onkyo, Yamaha vinatage amplifiers. There were plastic gears that cracked during the time..

Replacement gears were created using a precise 3D printer and tested for correct operation.

3D printed replacement gears

Compatible devices: Pioneer A-501R, A-502R, A-701R, A-702R, Onkyo A 8051, 8940, 9510, 9511, 9711, 9911, Yamaha AX-1070 and more.
The part is also labeled Yamaha Rotary Switch SRBA Gold VT148400 in Yamaha devices.

Compatible with ALPS ASD1016 Input Selector.

Compatible also with Sansui AU-X517R amplifier.

Available in e-shop.