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Brass Synchro Cone Ring: Turned with a Taper Matched to Its Seat
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Forge

18. uMfumfu 2026NO
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Brass Synchro Cone Ring: Turned with a Taper Matched to Its Seat

In a synchromesh gearbox a cone-shaped brass ring on the gear is pressed against a cone on the sliding collar, and friction brings the two to the same speed before the teeth engage (Wikipedia, Manual transmission). Factory rings are forged or pressed from brass or steel; this one is turned from brass bar, with its cone and the seat it runs on cut at one lathe setting so the tapers match. Method and sizes are ours. The picture: our drawing.
Ophakathi
Half a day

Imiyalelo

1

Face, drill and turn

Chuck the brass bar, face it, centre-drill and drill through, then turn the outside to the ring's diameter.

Izinto zokwakha zalesi sinyathelo:

Ubhamu LwethusiUbhamu Lwethusi1 ucezu

Amathuluzi adingekayo:

Umshini Wokuphendula InsimbiUmshini Wokuphendula Insimbi
Isibambi somshini wokuphenda esinemilomo emithathuIsibambi somshini wokuphenda esinemilomo emithathu
Ithuluzi lokusika le-latheIthuluzi lokusika le-lathe
Isethi yamabhitha okuqala imboboIsethi yamabhitha okuqala imbobo
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Uwoyela wokusikaUwoyela wokusika
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
Izibuko zokuphephaIzibuko zokuphepha
2

Bore the cone

Set the compound slide to a shallow angle and bore the inside to a cone with the boring bar. Do not touch the compound setting again.

Amathuluzi adingekayo:

Umshini Wokuphendula InsimbiUmshini Wokuphendula Insimbi
Induku yokusika ngaphakathiInduku yokusika ngaphakathi
Uwoyela wokusikaUwoyela wokusika
Izibuko zokuphephaIzibuko zokuphepha
3

Turn the seat to match

At the same compound setting, turn the matching outside cone on the gear's hub or collar, taking light cuts until the ring sits on it with its face just short of the shoulder.

Amathuluzi adingekayo:

Umshini Wokuphendula InsimbiUmshini Wokuphendula Insimbi
Ithuluzi lokusika le-latheIthuluzi lokusika le-lathe
I-Caliper Yedijithali Yamayintshi Ayi-6I-Caliper Yedijithali Yamayintshi Ayi-6
4

Part off and bed in

Part the ring off, file off the burr, and lap ring and seat together lightly so they bear all round. Clean off every trace of compound.

Amathuluzi adingekayo:

Insimbi yokuhlukanisa emshinini wokuphothaInsimbi yokuhlukanisa emshinini wokuphotha
Iqoqo LamafayelaIqoqo Lamafayela
Ingxube yokuphululaIngxube yokuphulula

Izinto

1

Amathuluzi Adingekayo

12

Le blueprint yenza

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Isibambeli

Iringi le-synchro cone lethusi

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Lama-blueprint abelana ngolwazi — amasu, izinto noma izimiso

Synchromesh

Synchromesh

ngu-MartinNO

Umsebenzi Wensimbi

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Facing and Turning to a Diameter: Taking a Cut You Can Predict

Facing and Turning to a Diameter: Taking a Cut You Can Predict

ngu-ForgeNO

Umsebenzi Wensimbi

39
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