# Fenner Drives T301024 B-LOC B103 24 mm | MROSupply.com - MROSupply.com ***Fenner Industrial Motion T301024 B-LOC B103 24 mm*** ## Product details: - Catalog number: T301024 - SKU: 818095 - Price: ***$54.96*** Each - Shipping: ***FREE SHIPPING*** ON ORDERS OVER $100 - Typically Ships in: 1 day - Brand: [Fenner Industrial Motion](https://www.mrosupply.com/brands/fenner-industrial-motion/) - Category: - [Screw Locking](htts://www.mrosupply.com/bushings/keyless-bushings/screw-locking/) - [Keyless Bushings](htts://www.mrosupply.com/bushings/keyless-bushings/) - [Bushings](htts://www.mrosupply.com/bushings/)- View suggested `Climax Metal` alternative [Climax Metal C123M-24X50 24mm x 50mm Locking Assembly Series C123](https://www.mrosupply.com/products/746072/as-markdown/) - Unit of measure: each - Weight: 0.700 lb - Technicall support: contact supplier for technical support on 800 243 3374 ## Product images: - https://static.mrosupply.com/images/noimage.webp ## Product attributes; - Axial Movement: Approximately 0.8 mm - Bore Diameter: 24 mm - Bore tolerance: 50.05 - Compliancy: RoHS - Component Bore Diameter: 50mm - Hub Contact Pressure: 136 N/sq-mm - Hub Diameter: 80.1 mm - Hub Pressure: 136 - Installation torque: 14 Nm - Internal/ External: Internal - Material: Steel - O.D.: 50 mm - Releasing/ Locking: Locking - Screw size: M6 x 20 - Self-Centering: Yes - Series: B103 - Shaft diameter: 24mm - Shaft Tolerance: 23.95 - Taper: Single - Thrust: 43645 - Torque Transmission: 524 Nm - Transmissible Thrust: 43645 N - Transmissible Torque: 524 N-m ## Product documents / software: - [CAD model](https://documents.mrosupply.com/product_documents/81/80/818095/fenner_T301024_RF3iTlU.stp) ## Suggested products: - [Fenner Industrial Motion T121024 B-LOC B112 24 mm](https://www.mrosupply.com/products/818041/as-markdown/) - [Fenner Industrial Motion T601024 B-LOC B106 24 mm](https://www.mrosupply.com/products/818181/as-markdown/) - [Fenner Industrial Motion T301024 B-LOC B103 24 mm](https://www.mrosupply.com/products/818095/as-markdown/) - [Fenner Industrial Motion 6202820UP Trantorque GT 24 mm](https://www.mrosupply.com/products/1436015/as-markdown/) - [Fenner Industrial Motion B401024 B-LOC B400 24 mm](https://www.mrosupply.com/products/817777/as-markdown/) ## Product's reviews: - Cutting and purchasing manager - The only problem I had they did not tell me it was shipping. - Great value - Same product I got from other vendors without the price gouging. Great site. - Round belts - These belt work exceptionally well for sewing machine applications. Very easy to change and are easily modified to fit any length. Excellent durability when it comes to industrial use sewing machines. We typically get several months(4-7) of use before replacement/modification is required. - One of my best suppliers - Great and fast service, product quality is so good! ## FAQ: - Should I use a Trantorque, a B-LOC bushing, a shrink disc or a compression hub?: Fenner splits these into internal and external devices. Trantorque and B-LOC bushings are internal, fitting between shaft and bore. Trantorque uses a single hex nut and reaches 3 in (75 mm) shafts; B-LOC uses several screws and approaches 24 in (600 mm). Fenner's technical team usually recommends Trantorque up to 1-1/2 in and B-LOC above that. Shrink discs and compression hubs are external. Shrink discs suit standard coupling hubs, flanges and hollow-shaft gearbox outputs, while compression hubs suit narrow components such as plate sprockets. For a small OD to ID ratio consider B800 or Trantorque OE; for very high torque, double taper B112 or B115. - What shaft and bore finish and tolerance do Fenner keyless devices need?: For keyless bushings Fenner recommends 32 to 125 micro-inch (0.8 to 3.2 micrometer) RMS on shaft and hub bore; compression hubs use the same range on the shaft. Turned, ground and polished stock is too smooth and can cause failure, so roughen it lengthwise with a file or emery paper. Tolerance varies by series: plus or minus 0.003 in on Trantorque GT and OE, 0.0015 in on Mini and 0.001 in on B-LOC B109, while B103 shafts are +0/-0.002 in on bores up to 4.724 in. Shrink discs instead set a maximum clearance between shaft and hub bore, from 0.025 mm on small shafts. - Do I oil or degrease before installing a Fenner keyless device?: It depends on the family. Trantorque: install as received, add no lubricant, and clean shaft and bore to bare metal with a non-petroleum solvent such as isopropyl alcohol. B-LOC bushings and compression hubs: these come lightly oiled, and the screws, tapers, shaft and bore should be clean and lightly oiled with no molybdenum disulfide. Shrink discs: these come with molybdenum disulfide on the tapers and screws; oil the hub OD lightly but clean all lubricant from the shaft and hub bore, because it greatly reduces torque capacity. On every family, do not use anaerobic adhesives such as Loctite or Permatex. - How do I tighten a Trantorque or B-LOC, and will the hub move along the shaft?: Trantorque: hand tighten the single nut, then use a torque wrench to the listed torque, for example 125 ft-lb on a 1 in GT. Over-tightening can damage the unit. At full torque GT and OE travel about 0.075 in along the shaft, Mini about 0.045 in and NT not at all. B-LOC devices: set the wrench about 5 percent above the listed torque, tighten screws in quarter turns over several passes, add one or two passes once quarter turns stop, then reset to listed torque and check that no screw turns. B103 moves about 0.032 in; B106, B112, B115 and B400 do not. Never tighten shrink disc screws before fitting the shaft. - How do I read Fenner keyless part numbers?: Fenner's Metals catalog lists part numbers in size tables and prints a key only for compression hubs, where BCH502100-025 is base BCH502100 (BCH50, 1 in shaft) plus 25 mm screws. Elsewhere, check your number against the table. B-LOC numbers usually show series, unit and size: B122400 is a B112 for 4 in, B122615 for 6-15/16 in, and B401050 a B400 for 50 mm. Fenner says the third digit on every B-LOC number gives the unit, 1 for metric and 2 for inch. B800 numbers vary, such as T8012 (12 mm) and T82206 (2-3/8 in). Shrink disc B0301 is size 30-10, in SD10 standard duty. TTQM2235 is a Trantorque OE for a 22 mm shaft and 35 mm OD; EN, DC and SS mean nickel plated, chrome coated and stainless, and UP on a Trantorque GT means un-plated, shipped lightly greased.