Taper Bore Sprockets American Standard

sproket lubang tirus-1

Korea Ever-Power American standard taper bore sprockets are manufactured to accept the American split taper bushing series — SH, SK, SF, E, F, J and N — covering shaft diameters from 1/2″ to approximately 4-7/16″ depending on bush size. The split taper bush concept in American standard differs slightly from the European taper lock design: the American split bush (B-066) and QD (quick-disconnect) bushing (B-085) systems are both self-releasing, but the QD type is more widely used in American heavy industry and is the predominant design specified by American OEMs for replacement sprockets.

Kategori:
Ajukan Pertanyaan Sekarang

#40 – #100

Chain Size Range

SH / SK / SF

Bush Series

S / D / T

Simplex / Duplex / Triplex

ANSI B29.1

Standard

Taper Bore Sprockets — American Standard

The taper bore sprocket is supplied as a hub only — the split taper or QD bush is ordered separately and provides the shaft grip, keyway and setscrew mechanism. This allows one sprocket to be ordered for multiple shaft sizes by changing the bush, and allows fast on-site shaft removal without a puller. The tooth profile conforms to ANSI B29.1, making these sprockets fully compatible with any American standard roller chain. Cover chain sizes #40 through #100, simplex to triplex.

Material is C45 carbon steel with induction-hardened tooth flanks. Cast iron (G22) variants available for abrasive slow-speed applications — suffix -CI when ordering. For the European taper lock equivalent (1008–5050 bush series), see our European taper bore sprockets. For QD bush sprockets see the B-085 QD range. Browse the kategori sproket penuh for all configurations.

Korea Ever-Power American taper bore sprocket split taper bushing ANSI B29.1

🔧 American vs European taper bush

Fitur American (SH/SK/QD) European (1008–5050)
Bush split Full split — two halves Partial split — slot only
Bore range Inch fraction Metric mm
Screws UNC hex bolts Metric cap screws
Self-ejecting Yes Yes

American Split Taper Bush Size Guide — Shaft Range & Typical Chain Size

American taper bushes are designated by letter codes (SH, SK, SF, E, F, J, N) rather than numeric codes as in the European system. Each letter corresponds to a specific taper diameter and shaft range. Specify the bush code when ordering the sprocket — the hub taper bore is machined to accept that specific bush series.

Bush Code Min Bore Max Bore Bolt Size Typical Chain / Application
SH ½″ 1-3/8″ 5/16-18 UNC #40, #50 light to medium conveyors
SK ½″ 1-7/8″ 3/8-16 UNC #40, #50, #60 medium drives
SF ½″ 2-7/16″ 1/2-13 UNC #60, #80 heavy industrial
E ¾″ 2-15/16″ 5/8-11 UNC #80, #100 heavy drives
F 1″ 3-7/16″ 5/8-11 UNC #100, #120 very heavy drives
J 1-3/8″ 3-15/16″ ¾-10 UNC #100, #120 large diameter sprockets
N 2″ 4-7/16″ 1-8 UNC #100, #120 maximum hub sprockets

Split taper and QD bushes are not included with the sprocket. Order bush separately specifying code and bore. The QD (B-085) and split taper (B-066) bush series are not interchangeable — confirm which type your drive uses before ordering the hub.

Taper Bore Sprocket Specifications — #40 through #100

All bores accept American split taper bushing. ANSI B29.1 tooth profile. C45 steel as standard, -CI cast iron on request. Bush sold separately.

taper-bore-sprocket-dimension-1

Chain Pitch (in) Z Range Bush Series Strand de at Z=17 (in) Hub Width (in)
#40 ½″ 11 – 60 SH, SK S, D, T 2.980 1 – 2¾
#50 ⅝″ 11 – 60 SK, SF S, D, T 3.720 1⅛ – 3
#60 ¾″ 11 – 60 SK, SF, E S, D, T 4.457 1¼ – 3¼
#80 1″ 9 – 60 SF, E, F S, D, T 5.796 1½ – 4
#100 1¼″ 9 – 45 E, F, J, N S, D 7.210 1¾ – 5

Hub width varies by strand — simplex narrowest, triplex widest. Specific hub dimensions depend on bush series selected. Contact us with chain number, tooth count, strand and bush series for dimensional confirmation and quote.

Split Taper Bush — Install & Remove

The American split taper bush differs from the European taper lock in one key respect: the bush is split completely into two halves rather than having a partial slot. This makes the American design truly self-ejecting — when the bolts are moved to the removal holes, tightening them pushes the two bush halves apart and releases the shaft grip without any force applied to the sprocket itself.

▶ Installation

1

Clean shaft, bush bore and sprocket taper completely — remove all grease and oil.

2

Assemble the two bush halves around the shaft. Slide the assembly into the sprocket taper bore.

3

Insert bolts through the drive holes in the flange. Oil thread and under bolt head. Tighten alternately to draw the bush fully into the taper.

4

Tighten bolts to specified torque. Re-check after 4 hours first running. Fill the unused holes with grease to prevent corrosion.

◀ Removal

1

Remove all bolts from the drive holes.

2

Insert the same bolts into the tapped removal holes in the sprocket hub (threaded holes separate from the drive holes).

3

Tighten the removal bolts alternately. The bolt ends bear against the bush flange and push the two bush halves apart — the bush springs open and releases the shaft.

4

Slide sprocket and bush off shaft. No hammer, no puller, no shaft damage. Bush can be reused if taper surfaces are undamaged.

North American Heavy Industry

Split taper and QD bushing sprockets are the dominant shaft-mounting method for heavy drives in North American industry — mining, aggregate, steel, paper and chemical plant. The American engineering standard for permanent heavy drives specifies QD or split taper over setscrew bore because of the superior grip and clean removal. Any drive requiring sprocket change more than once a year should use taper or QD bushing mounting.

Korean OEM Heavy Equipment

Large Korean construction and industrial equipment manufacturers export heavily to North America and specify ANSI chain with American-standard taper bushing sprockets for serviceability in the U.S. market. Korea Ever-Power taper bore sprockets in American bush sizes cover the full range of Korean OEM specifications, with the same quality standard as our European range. See the kategori sproket penuh.

Agricultural Equipment Service

#40 and #50 American taper bore sprockets on SK and SH bushes are widely used in North American grain handling, feed mill and agricultural conveyor drives. The seasonal nature of agricultural operations makes quick removal during the off-season critical for cleaning and inspection. Split taper bush mounting allows the service dealer to pull every sprocket on a grain elevator in hours rather than days.

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Request a Quote — American Standard Taper Bore Sprockets

Specify ANSI chain number, tooth count, strand, bush series (SH/SK/SF/E/F/J/N) and shaft bore in inches. Bush supplied separately or as package. Response within one working day.

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