We have a large stock of used underdriven gearboxes/speed reducers which include popular u.k. manufacturers such as David Brown Radicon, Renold, Croft, Holroyd, Fenner, Highfield, Wiseman, Higear and David Opperman.

Sizes of gearboxes/speed reducers range from 2¼" (55mm) to 28" (711mm) centres and are either left handed, right handed or double shaft output.

Worm and wheel underdriven gearboxes/speed reducers have high efficiency, high load bearing capacity and are suitable for either direction of rotation.  

We should have a gearbox/speed reducer to suit your requirements and can offer some assistance with specifications.

See below for a list of some of our current stock items: -

UNDERDRIVEN GEARBOXES

SIZE RATIO MAKE DETAILS HANDING

REF NO.
24 20.5 CROFT Size 24" Right & Left 12069
24 25.5 CROFT Size 24" Right 12068
24 5 CROFT Size 24" Right 12067
24 25 CROFT Size 24" Right 12064
24 21.5 RADICON RHU24 Right 12054
24 19.33 CROFT Size 24" Right 12052
24 50 RADICON 7BU24 Left 17950
24 60 RENOLD TWU24 Right 21912
20 45 CROFT Size 20" Right 12081
20 12.5 RADICON RHU20 Left 12073
20 12.5 RADICON RHU20 Right 12070
20 40 CROFT Size 20" Right 15154
20 35 RADICON RHU20 Right 21082
20 60 RADICON CNU20 Right 21735
18 50 WISEMAN 18FSWR Right 12066
18 7.5 CROFT Size 18" Right 12062
18 27.5 WISEMAN 18FSWR Right 21084
17 20 RADICON RHU17 Right 12078
17 22.5 RADICON RHU17 Right 12075
17 54 RADICON RHU17 Left 12065
17 50 RADICON RHU17 Right 12063
17 50 RADICON RHU17 Right 12060
17 22 RADICON RHU17 Left 12057
17 15 RADICON RHU17 Right 17581
17 25 HIGEARS HU17 Right 17934
17 12.75 RADICON RHU17 Right 17955
17 29.5 RADICON RHU17 Left 21089
17 14.75 RADICON 7CU17 Left 21338
17 20 RENOLD 17/0 Right 22240
14 28 RADICON RHU14 Right 12048
14 12.25 RADICON RHU14 Right 12041
14 70 RADICON RHU14 Right 12029
14 7.5 CROFT Size 14" Right & Left 12023
14 12.5 RADICON RHU14 Left 12022
14 15 CROFT Size 14" -----  12024
14 20 HOLROYD 14HU Left 14846
14 30 RADICON ----- Right 15661
14 25 RADICON RHU14 Right 15666
14 12.5 RADICON RHU14 Right 18127
14 50 RADICON 7BU14 Right 18375
14 25 RADICON RHU Left 19030
14 25 RADICON 6BU14 Left 19537
14 30 RADICON ----- Left 19538
14 30 RADICON CU14 ----- 19833
14 70 HOLROYD TU14 Right & Left 20316
14 70 HOLROYD 14/0 Left & Right 20318
14 30 RADICON 7BU14 Right 21265
14 9.8 RADICON 7CU14 Left 21325
14 79/2 HOLROYD 14NDU Right 22504
14 70 RENOLD TWU14 Right 22509
13½ 30 MOSS Size 1350 Right 12586
12 50 RADICON RHU12 Right 11966
12 50 RADICON RHU12 Right 11969
12 36 RADICON RHU12 Left 12002
12 50 RADICON RHU12 Right 13405
12 60 HOLROYD HU12 Left 13759
12 60 HOLROYD HU12 Left 14841
12 7.5 RADICON RHU12 Left 15825
12 7.5 RADICON RHU12 Right 15939
12 7.5 RENOLD 12/0 Left 16093
12 23 RADICON RHU12 Right 16671
12 12 HOLROYD HU12 Left 17530
12 7.5 RADICON RHU12 Right 17545
12 7.5 RADICON RHU12 Left 17548
12 30 WISEMAN 12FS Left 17602
12 30 CROFT Size 12" Right 17689
12 5 CROFT Size 12" Left 18133
12 5 RENOLD 12/0 Right 18134
12 20.5 HOLROYD HU12 Right 18147
12 7.5 RADICON RHU12 Left 18465
12 25 RADICON 7BU12 Right 20328
12 25 RADICON 7BU12EB Right 20331
12 25 RADICON 7BU12EB Left 20568
12 50 WISEMAN FSWR Left 20567
12 29.5 RADICON CU12 Right 21069
12 29.5 RADICON CU12 Left 21071
12 16.3 RADICON RHU Left 21114
12 25 RADICON RHU Right 21127
12 25 RADICON RHU Left 21088
12 50 RADICON RHU Right 21135
12 29.5 RADICON 7BU12 Right 21264
12 60 HOLROYD WU12 Left 21401
12 29.5 RADICON 7CU12 Left 21507
12 29.5 RADICON 7CU12 Right 21508
12 40 RADICON 7BU12 Right 22267
12 50 RADICON RHU12 Left 22503
12 25 RADICON NU12 Right 22583
10½ 65 CROFT Size 10½" Right & Left 14272
10½ 18 CROFT Size 10½" Left 19852
10½ 30 CROFT Size 10½" Right 22520
10 12.7 RADICON RHU10 Right 11915
10 60 RADICON RHU10 Right & Left 15505
10 10 HOLROYD ----- Right 15830
10 10 HOLROYD Size 10 Right 15831
10 20 RADICON RHU10 Left 17529
10 25 RADICON RHU10 Right 17543
10 50 HOLROYD Size 10 Right 17582
10 20 HIGEARS HI10 Left 17674
10 52 RADICON RHU10 Right 18187
10 29.5 RADICON 7CU Left 19020
10 40 HOLROYD 10/0 Right 19026
10 50 RADICON RHU10 Right 19587
10 11.25 RADICON RHU10 Right 20432/3
10 11.25 RADICON RHU10 Right 20435-38
10 12.25 HOLROYD 10/0 Right 20439
10 9.5 HOLROYD 10HU Left 21110
10 11.6 RADICON RHU Left 21113
10 10 RADICON 8BU10 Right 21272
10 11.25 RADICON RHU10 Right 21310
10 11.25 RADICON RHU10 Right 21312
10 45 HOLROYD WU10 Right 21321
10 8.8 RADICON 7CU10 Left 21328
10 60 RADICON CU10 Right 21331
10 60 RADICON 7BU10 Right 21402
10 59.5 RADICON RHU Right 21407
10 29.5 RADICON 7CU10 Right 21430
10 40 HOLROYD 10/0 Left 21442
10 60 RADICON 7BU10 Left 21443
10 60 RADICON 7BU10 Left 21490
10 60 RADICON 7BU10 Right 21492
10 40 HOLROYD WU10 Left 21494
10 40 HOLROYD WU10 Right 21511
10 40 RADICON WU10 Right 21513
10 40 HOLROYD WU10 Right 21515
10 60 RADICON BU10 Left & Right 21530
10 50 RADICON RHU10 Right 21730
10 50 RADICON RHU10 Right 21731
10 60 RENOLD WU10 Right 21860
10 9.75 RADICON 7BU10 Left 22254
10 50 RADICON 7CU10 Right 22519
9 40 HOLROYD 9HU Left 17585
9 20 RENOLD WU9 Left 22511
9 40 RENOLD 9/0 Right 22532
8 60 RADICON RHU8 Left 12591
8 25 WISEMAN ----- Left 11892
8 50 CROFT Size 8 Right 11875
8 40 RADICON RHU8 Right 11873
8 15 RADICON 8HU Left 11869
8 25 CROFT Size 8 Right 13691
8 30 HOLROYD ----- Right 13652
8 60 RADICON RHU8 Left 14405
8 45 CROFT Type 80 Right 15955
8 45 CROFT Type 80 Right 15957
8 12 RADICON BU800 Right 17028
8 15 RADICON ----- Left 17208
8 60 HOLROYD HU8 Right 17220
8 30 HIGEARS ----- Right 17225
8 35 HIGEARS ----- Left 17522
8 20 RADICON BU800 Left 17540
8 20 HOLROYD ----- Right 17551
8 40 RADICON NU800 Right 18013
8 25 RADICON BU800 Left 18284
8 11.75 RADICON RHU8 Right 18500
8 11.75 RADICON RHU8 Right 18501
8 15 RADICON CU800 Left 19302
8 15 RADICON 6BU800 Left 19584
8 30 RADICON 6BU800 Right 19731
8 30 CROFT WU8 Right 20055
8 14.4 RADICON BU800 Right & Left 20440
8 50 RADICON RHU Right 21107
8 12 RADICON NU800 Left 21157
8 45 RADICON CU800 Left 21195
8 45 RADICON CU800 Left 21196
8 60 RADICON ----- Right & Left 21311
8 15 RADICON CU800 Left 21336
8 60 RADICON 6BU800 Left 21476
8 20 HAINSWORTH ----- Right 21856
8 20.5 HOLROYD 8HU Right 22249
7½ 70 CROFT Size 7½" Right 12172
7½ 80 CROFT Size 7½" Right 20580
7½ 40 CROFT Size 7½" Right 21559
7½ 5 CROFT Size 7½" Left 21869
7 20 RADICON BU700 Left 18097
7 30 RADICON CU700 Left 19520
7 11.5 RADICON RHU7 Right 20584
7 25 RADICON RHU Left 22514
6¼ 30 CROFT ----- Left 14689
6¼ 30 CROFT ----- Right 14691
6¼ 30 CROFT ----- Left 14698
6¼ 25 CROFT ----- Left 15520
6¼ 40 CROFT ----- Left 17099
6¼ 30 CROFT ----- Right 14728
6¼ CROFT ----- Left 17592
6¼ 7.5 CROFT ----- Left 20157
6¼ 60 CROFT ----- Left 22257
6 15 HOLROYD HU6 Right & Left 12620
6 80 RADICON RHU6 Right 12249
6 20 RADICON RHU6 Right 12238
6 20 RADICON ----- Right 12215
6 25 RADICON RHU6 Left 12214
6 25 RADICON RHU6 Right 12208
6 25 RADICON ----- Left 12200
6 80 RADICON RHU6 Right & Left 12151
6 20 RADICON ----- Right & Left 12146
6 25 HOLROYD HU6 Right 12126
6 9.66 MOSS ----- Right 12123
6 35 CROFT 6/0 Left 14012
6 18.5 RADICON ----- Left 15255
6 30 RADICON ----- Left 15522
6 35 RADICON RHU6 Left 15676
6 25 RENOLD 6/0 Right 16096
6 40 RADICON RHU6 Left 16766
6 50 HIGEARS ----- Left 17222
6 50 HIGEARS ----- Left 17588
6 12 HOLROYD HU6 Right 18113
6 25 CROFT 60 Left & Right 18174
6 20 RADICON ----- Right 18299
6 20 FENNER ----- Left 18306
6 45 HOLROYD WU6 Right 21267
6 40 HOLROYD WU6 Left 21406
6 5 RADICON A1600/U Left 21861
6 5 RADICON A1602/U Right 21862
6 5 RADICON A1600/U Left 21863
6 5 RADICON A1601/U Left 21864
6 40 RADICON RHU6 Right 22108
6 25 WISEMAN 6FS Right 22121
6 50 RADICON BU600 Right 22128
6 12.25 HOLROYD Type S Left 22129
6 12.25 HOLROYD Type S Left 22130
6 40 HOLROYD 6HU Right 22253
6 30 RADICON A1600U Universal 22524
6 50 RADICON A1600 Universal 22585
6 12 HAINESWORTH Size 6" Universal 22586
5 60 RADICON 6BU500 Left 12566
5 20 CROFT Size 5 Left 12355
5 20 RADICON ----- Right 12347
5 60 CROFT ----- Right & Left 12333
5 40 CROFT Size 5 Left 12332
5 20.5 OPPERMAN ----- Left 12294
5 20.5 FENNER ----- Left 12289
5 40 HIGEARS ----- Right 12286
5 40 RADICON 6BU Left 12280
5 15 RADICON case only Left 12273
5 50 HIGEAR ----- Left 13685
5 50 RADICON 6BU Right 14404
5 60 WALLWORK ----- Universal  l2276
5 50 RADICON BU500 Left 14546
5 70 RADICON 6BU500 Left 14569
5 50 CROFT Size 5 Right 15001
5 50 CROFT Size 5 Right & Left 15002
5 60 CROFT Size 5 Right 15133
5 60 CROFT Size 50 Right 15136
5 60 CROFT Size 50 Right 15138
5 69 MOSS ----- Right 15143
5 60 CROFT ----- Left 15682
5 25 RADICON 6BU500 Right 15727
5 30 RADICON RHU5 Left 17209
5 50 CROFT Size 5 Left 17297
5 50 CROFT Size 5 Right 17299
5 20.5 FENNER ----- Right 17492
5 50 CROFT Size 5 Left 18018
5 60 RENOLD 5/0 Left 18026
5 70 HOLROYD FHK5 Left 18176
5 40 CROFT 50 Left 18483
5 70 RENOLD 5/0 Left 18504
5 70 HOLROYD 5/0 Right 18508
5 70 HOLROYD 5/0 Right 19850
5 25 CROFT Size 5 Left 20156
5 15.5 HOLROYD 5HU Right 20562
5 70 HOLROYD 5/0 Right 20582
5 24 HOLROYD 5/0 Right 21156
5 40 RADICON CNU500 Left 21376
5 25 HOLROYD 5HU Left 21574
5 50 RADICON A1250U Left 21849
5 50 RADICON A1250U Left 21850
5 50 RADICON A1250U Left 21851
5 60 OPPERMAN PF5 Right 22106
5 7.5 CROFT Size 5 Right 22124
5 70 CROFT Size 5" Right 22246
5 15.5 HOLROYD 5HU Left 22248
5 30 WISEMAN 5FSWR Right 22117
5 20 RADICON CU500 Right 22529
5 20 RADICON CU500 Right 22584
5 20 RADICON CU500 Right 22531
5 6 RADICON RHU Left 22530
5 6 RADICON RHU Left 22582
5 7½ RADICON BU500 Left 22527
5 7½ RADICON BU500 Left 22528
5 5 RADICON NU500 Left 22526
4¼ 60 CROFT ----- Left 16868
4¼ 60 CROFT ----- Left 16867
4¼ 45 SABRINKS Model 110 Left 21724
4 15 HOLROYD 4SU Right & Left 12375
4 9.5 HOLROYD 4HU Right 12339
4 5 MOSS ---- Right & Left 12266
4 45 RENOLD 4/0 Left 14574
4 60 RADICON case only Right 14829
4 15 RADICON A1000UH Right 14889
4 40 RADICON A1000U Right 14895
4 20 CROFT 40 Left 15141
4 50 HIGEARS ----- Left 15469
4 20 CROFT 40 Right 15471
4 10 MOSS ----- Left 15472
4 30 FENNER ----- Left 16762
4 60 RADICON case only Right 16857
4 25 RADICON 6BU400 Right 17558
4 50 RADICON RHU Left 17848
4 50 HOLROYD 4SU Left 18378
4 40 CROFT 6BU400 Right 19695
4 50 HOLROYD 4HU Left 20045
4 60 HOLROYD 4SB Left 20262
4 70 HOLROYD HU Right 20266
4 25 RADICON 6BU400 Left 20306
4 19.5 COMBIDRIVE BS100 Right 13507
4 10 HOLROYD 4HU Left 19524
4 63 ROSSI RV100U Universal 20450
4 12.5 RADICON RHU Right 21209
4 30 BROWN PESTELL E110 VSX Universal 21487
4 30 HOLROYD 4HU Left 21555
4 40 RADICON BU400 Left 21689
4 60 HOLROYD 4HU Left 22250
3½ 30 RADICON 7BU337 Left 16262
3½ 7 CROFT ----- Right 17951
3½ 20 CROFT ----- Left 18142
3½ 25 HOLROYD 3.5HU Left 20312
3½ 40 RADICON B6/U337 Left 20564
3½ 25 RADICON SCA287 Universal 21568
3½ 20 CROFT ----- Left 22256
3¼ 20 SABRINKS ----- Left 15456
3 ----- CROFT Type 30 Universal 20069
3 5 RADICON A287 Universal 12868
3 5 RADICON 287 Universal 12872
3 10 HOLROYD 3U Right & Left 16794
3 25 RADICON 8CA287 Universal 16852
3 50 CROFT ----- Universal 16882
3 50 RADICON RHU Left 16902
3 12.5 RADICON CA287 Universal 19601
3 12.5 RADICON CA287 Universal 19602
3 20 RADICON 7BAM287 Universal 17637
3 20 BROWN PESTELL ----- Universal 20533
3 14.5 RADICON RHU Right 15155
3 10 HOLROYD ----- Left 20535
3 30 CROFT ----- Left 12503
3 5.2 RADICON CA287 Universal 21137
3 25 RADICON 8CA287 Universal 21568
3 25 RADICON 8CA287RA Universal 22101
3 7.5 CROFT Size 3 Universal 22114